TECH

M/T Tire and Wheel Warranty

1. Mickey Thompson Standard Limited Warranty
 

The Complete Mickey Thompson Passenger and Light Truck Tire Limited Warranty

 

ELIGIBILITY:

This warranty applies to the original purchaser of a Mickey Thompson passenger or light truck tire and is not transferable. Eligible tires must be purchased new and must be used on the vehicle which they were originally installed. Additionally, they must be an equivalent or greater load index to that specified by the vehicle manufacturer. For warranty exclusions, please refer to the complete “Mickey Thompson Passenger and Light Truck Tire Limited Warranty” by CLICKING HERE or contact Mickey Thompson’s technical support department at 1-800-222-9092.

STANDARD COVERAGE

If your Mickey Thompson branded tire becomes unserviceable as a result of an eligible adjustable condition during the first 2/32″ of tread wear, it will be replaced with an equivalent new Mickey Thompson tire, FREE OF CHARGE. When the tread is worn more than 2/32″, if the product exhibits an eligible adjustable condition, it will be replaced on a pro rated basis. For the tire pro ration schedule, please refer to the complete “Mickey Thompson Passenger and Light Truck Limited Warranty” at www.mickeythompsontires.com or contact Mickey Thompson’s technical support department at 1-800-222-9092. You must present proof of purchase and be the original owner when requesting a replacement for your tire.

A replacement charge may be required in order to obtain a replacement tire. The replacement charge will be determined by multiplying the dealer’s current selling price by the percentage of original tread depth worn from the tire. You must pay for mounting, balancing, and any other additional charges, such as taxes or the acceptance of a higher priced replacement tire.

Any Mickey Thompson tire that does not deliver satisfactory service due to a balance, out of round or a ride complaint issue will be replaced without charge within the first 2/32nds of the tire’s tread life. After the first 2/32nds the tire is not warrantable for the aforementioned conditions.

TREAD LIFE

When the tread becomes worn to 2/32″ (1.6mm) anywhere on the tire (shown by tread wear indicators molded into the tread grooves), the tire is worn out. WARNING-for important safety information, you must read the section titled “Tire Service Life” and Important Tire Safety and Fitment Information Warnings section of this guide. Additional Tire Safety Information is also available at www.mickeythompsontires.com or from your local dealer.

HOW TO OBTAIN AN ADJUSTMENT

Tire adjustments must be presented to the dealer which originally sold the tire. You must be able to provide proof of purchase and be the original owner when requesting a replacement for your tire. See “Where to Go for Warranty Replacement”.

NO ROAD HAZARD COVERAGE

Many dealers sell or provide their own warranty coverage for road hazards and/or repairs. Mickey Thompson does not provide this coverage. Check with your dealer to determine if Road Hazard/Repair coverage is available from them.

REPLACEMENT WARRANTY

If you receive a replacement tire under the terms of this Warranty, the replacement tire will be covered by the Warranty then currently given by Mickey Thompson for the replacement tire.

WHERE TO GO FOR WARRANTY REPLACEMENT

Contact the Mickey Thompson dealer where the tire was originally purchased for initial inspection. If the dealer which originally sold the tire is no longer available, please contact Mickey Thompson’s technical support department via email at tech@mickeythompsontires.com or 1-800-222-9092 for assistance in finding a Mickey Thompson dealer (Proof of purchase will be required) You may also visit our website Dealer Locator.

CONDITIONS AND EXCLUSIONS

Any tire, no matter how well constructed, may fail in service or otherwise become unserviceable due to conditions beyond the control of the manufacturer. Nothing in this Warranty is intended to be a representation by Mickey Thompson that tire failure cannot occur.

TIRES: RADIAL VERSUS BIAS

Bias tires tend to ride and handle differently than radials. Bias ply or bias belted and radial tires should not be mixed on the same vehicle.

NO WARRANTY POLICY RACING TIRES AND TUBES

Mickey Thompson offers racing tires and tubes for sale. These products should be used in racing applications only. Due to the many varied and different conditions to which racing tires and tubes are exposed and because of the manner in which racing is conducted, Mickey Thompson makes absolutely no warranty, expressed or implied, as to the fitness for a general or particular purpose or of merchantability in connection with any offer of sale or sale of racing tires and tubes. “MICKEY THOMPSON RACING TIRES OR TIRES USED IN RACING ARE SOLD AS IS”. Not all racing tires are designed, tested or labeled to meet the minimum safety and performance requirements of the Federal Motor Vehicle Safety Standards (FMVSS). Tires that do not meet these Federal safety standards can not be sold for use on public highways and should not be used on any public highway in any manner.

WARNING: RUNNING ALL DESIGNATED RACE TIRES ON A DYNO WILL NULLIFY THE WARRANTY!

CONSUMER RIGHTS

This warranty does not in any way extend to any consequential or incidental damages or losses. All incidental and consequential damages and losses are hereby expressly disclaimed and excluded from this warranty. There is no other warranty, or liability, expressed or implied, applicable to these products. No representative has the authority to make any representation, promise, or agreement except as stated herein. Some states do not allow exclusion of incidental or consequential damages. As a result, this limitation or exclusion may not apply to you.

This Warranty gives you specific legal rights, and you may also have other rights that vary from state to state.

Please refer to www.mickeythompsontires.com for the complete “Mickey Thompson Passenger and Light Truck Limited Warranty” or contact Mickey Thompson’s technical support department at 1-800-222-9092 for additional information.

MICKEY THOMPSON WHEELS LIMITED LIFETIME WARRANTY

Mickey Thompson Performance Tires warrants to the original purchaser that a new M/T Wheel is free from defects in material and workmanship and agrees to replace a M/T Wheel which fails in normal use and service resulting from defects in material and workmanship for the life of the vehicle for which said wheel was intended and purchased for. Mickey Thompson Performance Tires does not warrant any wheel which has been subject to misuse or abuse including the following;

  • Using tires which are oversized according to the standards recommended by the Tire and Rim Association, Inc.;
  • Loading the wheel beyond the applicable maximum wheel load as specified by Mickey Thompson Performance Tires;
  • Any type of racing or activity which subjects wheels to the abuse of racing, whether on the road or off;
  • Inflating beyond the maximum specified on any given tire size as specified by Mickey Thompson Performance Tires;
  • Changing or altering the original condition of the wheel or by subjecting it to any processing such as welding or straightening.

WHEEL FINISH WARRANTY

Classic III Black, Sidebiter II, Classic Baja Lock, and Street Comp SC-5 Wheels – 1 Year All other wheels – No Finish Warranty

THERE IS NO WARRANTY THAT WHEELS ARE MERCHANTABLE OR SATISFACTORY FOR ANY PARTICULAR PURPOSE NOR IS THERE ANY OTHER WARRANTY EXPRESSED OR IMPLIED EXCEPT AS SET FORTH HEREIN.

Mickey Thompson Performance Tires shall not be liable for any incidental or consequential damages for any breach of warranty, its liability and the purchaser’s exclusive remedy being expressly limited to replacement of defective wheel, as herein provided. Replacement will be handled by an authorized Mickey Thompson Performance Tire Dealer or Mickey Thompson Performance Tire representative.

This warranty gives you specific legal rights. You may also have other rights under applicable laws.

For service assistance or information call or write to:
Mickey Thompson Tire & Wheels
4600 Prosper Drive
Stow, Ohio 44224
Telephone: (330) 928-9092
Fax: (330) 928-0503
E-mail: info@mickeythompsontires.com

 

 
 
2. Important Tire Safety And Fitment Information
IMPORTANT TIRE SAFETY AND FITMENT INFORMATION
 

PLEASE READ!

 

Mickey Thompson Tires recommends that all vehicle owners and users (called “users”) understand and adhere to the tire safety and fitment warnings, recommendations, guidelines, and instructions (“tire safety and fitment information”) (i) provided by the original equipment (OE) vehicle manufacturer, and (ii) available within the transportation industry and from the government.  Specifically, before installing any tires on a vehicle, the user should refer to and obtain an understanding of the tire safety and fitment information available (i) in the vehicle’s owners manual and related materials provided with the vehicle, and that can otherwise be obtained from the OE vehicle manufacturer; (ii) the Rubber Manufacturers Association (www.rma.org), and (iii) the National Highway Traffic Safety Administration (www.nhtsa.gov). 

As more fully explained in the tire safety and fitment information, failure to follow the tire safety and fitment information may adversely affect the vehicle’s and/or tire’s performance capabilities, including but not limited to the vehicle’s handling/stability capabilities, and could result in tire failure (including tread/belt separation or blowout).  The user must explain the intended service for the vehicle to the local installer/dealer, and the local dealer and installer of the vehicle’s tires are responsible for providing the tire safety information to the user, including the potential risks associated with not following the tire safety and fitment information.

Before installing any tires on the vehicle, the user must (i) review, discuss, and obtain an understanding of the tire safety and fitment information with their local installer/dealer, including the potential risks associated with not following the tire safety and fitment information; and (ii) have a local vehicle service professional inspect the vehicle (including any aftermarket modifications) to advise as to any potential risks associated with installing the tires desired by the user on the vehicle.  If, after doing so and considering this information, the user chooses to assume any potential risk and install a non-OE replacement tire on their vehicle (particularly when the user has chosen to install an aftermarket suspension on the vehicle which differs from the OE suspension), the fitment of the tire requires, at a minimum, all of the following special considerations are met:

  • All tire installations must be done by trained service professionals using proper tools and procedures.

 

  • Refer to all OE vehicle manufacturer, Rubber Manufacturers Association (www.rma.org), and National Highway Traffic Safety Administration (www.nhtsa.gov) warnings and guidelines.  For additional tire safety related information, see the following links:

    Rubber Manufacturers Association (RMA)
                        Tire Safety
                        Be Smart/Play Your Part Brochure
                        Tire Safety and Care Guide
                        Replacement Guidelines for Passenger and Light Truck Tires

    National Highway Traffic Safety Administration (NHTSA)
                        Vehicle Safety
                        Tire Safety – Everything Rides On It

  • The local installer and dealer are responsible for explaining the tire safety and fitment information to the user.  In addition, the user may also contact the Mickey Thompson Tires tech department at (800) 222-9092 or refer to the information at www.mickeythompsontires.com.
  • Reference the maximum load carrying capacity and load index of the vehicle’s specified OE tire as listed on the vehicle’s tire placard and/or certification label.  A tire must be selected with a maximum load carrying capacity and load index that is equal to or greater than the vehicle’s specified OE tire maximum load carrying capacity and load index.

 

  • Reference the speed rating of the vehicle’s specified OE tire as listed on the vehicle’s tire placard and/or certification label.  A tire must be selected with a speed rating that is equal to or greater than the speed rating of the vehicle’s specified OE tire.
  • If the replacement tire has a maximum inflation pressure (as listed on the tire sidewall) different than the maximum inflation pressure on the OE tire, then the vehicle’s tire placard must be updated by the installer to reflect the proper inflation pressure for replacement tire.  The user may need to make adjustments to inflation pressure, including to prevent overinflation of the tires and/or to provide an adequate load carrying capacity as compared to the OE tire.  For suggested inflation pressure in the Mickey Thompson tires used on the vehicle, contact the vehicle manufacturer and consult the current Tire and Rim Association Year Book, or contact the Mickey Thompson Tires tech department at (800) 222-9092.  Please have your OE specified tire size and OE cold inflation pressure (located on vehicle’s tire placard), as well as the new tire size available for the tech staff.  By providing the inflation pressure information to the user, Mickey Thompson Tires is not in anyway recommending or endorsing the use of a tire that does not fully comply with the tire safety and fitment information referred to above.  The inflation information is simply being provided (to users who have undertaken the steps discussed above as to understanding the tire safety and fitment information and have knowingly chosen to install the non-OE tire), in order to prevent overinflation of the tire and to ensure the replacement tire maintains an adequate level of load carrying capacity as compared to the OE specified tire. 

                 Text Box:      Driving on tires with improper inflation pressure is dangerous.    Underinflation causes excessive heat buildup and internal structural damage.    Overinflation makes it more likely for tires to be cut, punctured, or damaged by impact.    Underinflation, overinflation, cuts, punctures, and impacts can cause a tire failure, including tread/belt separation or blowout (even at a later date), which in certain circumstances could lead to an accident and serious personal injury or death.    Consult the vehicle’s tire placard, certification label, or the owner's manual for the OE vehicle manufacturer’s recommended inflation pressures.  As noted above, these inflation pressures may need to be adjusted in certain circumstances.    If your tire pressure is reduced for off-road performance, be certain to increase your tire pressure to recommended levels for highway use.  The tires should also be visually inspected for any signs of damage from off-road service.
             

  • Due to inconsistencies in vehicle manufacturing and unknown production changes, when "upsizing" to a tire with a larger overall diameter, always consult a local professional installer (including for vehicles with unmodified OE suspensions).
  • Different suspension lift manufacturers’ requirements may vary.  For lifted and/or modified vehicles, always check with the vehicle’s suspension lift manufacturer to find the suggested wheel and tire combination and additional safety information.

 

  • The vehicle’s braking system (including ABS system), tire pressure monitoring system (TPMS), handling characteristics, stability characteristics, speedometer accuracy and transmission shift-points may be affected.  The local installer and dealer are responsible for explaining these differences to the user.

 
Text Box:                Installing tires with a larger outside diameter than the OE tires (or modifying the vehicle’s suspension) may create a higher center of gravity for the vehicle being fitted.  This can alter the vehicle’s braking, handling, and response characteristics.    For example, the user must exercise caution and understand that extra time will be needed for braking and accelerating; cornering and maneuvers can not be performed as quickly; and vehicle stability may be adversely affected.  Failure to fully understand the vehicle's altered characteristics could lead to a loss of vehicle control, an accident (including rollover), and serious personal injury or death.      The local installer and dealer are responsible for explaining these differences to the user.  The user must take time to understand their vehicle's altered characteristics to prevent loss of control, an accident (including rollover), and serious personal injury or death.    Mickey Thompson Tires also recommends the following:  •   Always wear your seat belt  •  Always obey all speed limits and traffic signs  •  Always check your tire pressure and visually inspect for any signs of damage or abuse at least monthly and before all long trips   •   Always operate your tires at the recommended inflation pressure.  As previously discussed, underinflation causes excessive heat buildup and internal structural damage.  Underinflation can cause a tire failure, including tread/belt separation or blowout (even at a later date), which in certain circumstances could lead to an accident and serious personal injury or death.  If, after considering this information and the tire safety and fitment information, the user chooses to assume any potential risk and reduce the tire pressure for off-road use, the user should be sure to increase the pressure back to recommended levels for highway use.  The tires should also be visually inspected by a trained service professional for any signs of damage from off-road service and/or underinflated operation, and immediately removed from service if any signs of damage are present.

  • Accelerated wear of various OE components on the vehicle may result.

 

  • Only mount tires on wheels with approved rim widths.  For proper rim width ranges, refer to www.mickeythompsontires.com, the Mickey Thompson Tires product catalog, or contact the Mickey Thompson Tires tech department at (800)222-9092.

Mickey Thompson Performance Tires
4600 Prosper Drive
Stow, OH 44224

Website: mickeythompsontires.com
E-mail: tech@mickeythompsontires.com
Phone: 330.928.9092

 

General Tech Bulletins

1. Understanding The Service Life Of Your M/T Tires
UNDERSTANDING THE SERVICE LIFE OF YOUR M/T TIRES
 
DETERMINING THE AGE OF A TIRE
The manufacturing date of a tire is incorporated into an 11 digit code, called a TIN (Tire Identification Number) located down by the bead of the tire. The only exception would be most Pro Drag Radials, which do not incorporate traditional TIN’s. On street legal tires, the TIN is preceded by the letters “DOT”.
The last four numbers of the TIN represent the week and year of manufacture. In the Example below, this tire was produced the 35th week of 2008.

EXAMPLE: CY1JM5FJ3508 (3508 = date code)

THE SERVICE LIFE OF YOUR M/T TIRES IS NOT ENTIRELY DICTATED BY CHRONOLOGICAL AGE.

All M/T tires are designed with conscience efforts to maximize tire life with maximum performance. That being said, the useful life of a tire is a function of its use, application, and storage conditions. Since these elements can vary widely, and are not controlled by the manufacturer, accurately predicting the life of any specific tire based on calendar age is near impossible.

However, with that understanding Mickey Thompson does recognize the benefit of a uniform approach regarding the service life issue. Accordingly, M/T has come up with the following age criteria for removing tires from service. These dates are based from the manufacturing date.

  • Race Tires – 4 years.
  • Bias Truck Tires – 8 years
  • Radial Light Truck Tires – 10 years
  • Passenger Tires – 10 years

Under no circumstances should these recommendations be consider as an “expected” service life. Most tires will need to be replaced before these time limits are met due to service conditions.

Tires can be removed for several reasons, such as:

  • Tread worn down to the minimum depth
  • Signs of damage (cuts, cracks, punctures, impact damage, etc)
  • Abuse (Long sustained burnouts, overload/under-inflation, improper repair etc)
  • Weather checking
  • Misapplication
  • Performance levels falling off.

TIPS FOR MAXIMIZIING THE LIFE OF YOUR M/T TIRES.

GENERAL

  • Proper inflation pressure and rim widths. This will help evenly distribute the load across the contact patch and even out wear.
  • Inspect the tires for damage such as cuts, leaking valve stems, or punctures.
  • If the vehicle is not frequently used, keep the tires out of direct sunlight.
  • Proper balance and alignment.

RACE TIRES

  • Rotate the tires as often as you can. If they “feather” too much in one direction, they may take a run or two to come back. This also means they should be rotated more often.
  • Never let the tires sit flat or at low inflation pressures while under load on the car. Put the car up on jacks, or remove the tires and store them on their side.
  • Tubes at times can help extend the tire life.
  • Refer to Drag Tech Bulletin # 5 for proper storage.

This is Mickey Thompson General Technical Bulletin #1.
Revised 5/27/09
For more information regarding Mickey Thompson Performance Products
Website: mickeythompsontires.com
E-mail: tech@mickeythompsontires.com
Phone: 330.928.9092

 
2. Understanding DOT Tire Inflation Pressures and Load Capacity
UNDERSTANDING DOT TIRE INFLATION PRESSURES AND LOAD CAPACITY
 
This document includes information regarding proper inflation pressures for Highway use of DOT tires.

TIRE SIDEWALL INFORMATION
Federal regulations mandate that tire manufactures place permanent information on all DOT tires showing maximum load and inflation. The inflation pressure shown is the maximum allowable under any circumstance, and necessary only to provide a safe load carrying capacity of the tire or when sustained high speeds are expected.

PROPER INFLATION PRESSURE

Again, the pressure listed on the tire sidewall is the maximum pressure and not intended as a guide for normal inflation pressure. These things are dictated by the vehicles weight and use (ie: high speed). Always start with the vehicle manufacturer’s information on inflation pressures. With modified vehicles, or vehicles using tire sizes other than OE, it is valuable to understand the weight bias of the vehicle and intended use along with the maximum load capacity and inflation.

Always use a tire with a load carrying capacity that matches or exceeds the weight carrying capacity of the OE tire. With light truck tires and applications, the load capacity is more critical than the load range when choosing non OE sizes. Due to the reduced load capacity on P-metric tires, Mickey Thompson does not recommend their use on O.E. LT tire applications.

It is also important not to check tire pressure when the tires are hot after use. Over-inflation can produce a harsh ride, makes the tires susceptible to impact damage, and promotes faster than normal tread wear along with decreased traction performance. Under-inflation (or over-loading) will cause excessive heat build up which can lead to tire failure.

This is Mickey Thompson General Technical Bulletin #2.
Revised 6/3/09
For more information regarding Mickey Thompson Performance Products
Website: mickeythompsontires.com
E-mail: tech@mickeythompsontires.com
Phone: 330.928.9092

 
3. Diameter, Rollout (Circumference) And Revolutions Per Mile Chart
DIAMETER, ROLLOUT (CIRCUMFERENCE) AND REVOLUTIONS PER MILE CHART
 
Below is a chart to assist in vehicle drive-train calculations.

Diameter

Rollout

Revs/Mile*

17.5

55.0

1222

18

56.5

1186

18.5

58.1

1152

19

59.7

1120

19.5

61.3

1090

20

62.8

1061

22

69.1

960

22.5

70.7

938

23

72.3

917

23.5

73.8

896

24

75.4

877

24.5

77.0

858

25

78.5

840

25.5

80.1

823

26

81.7

807

26.5

83.3

791

27

84.8

776

27.5

86.4

761

28

88.0

747

28.5

89.5

733

29

91.1

720

29.5

92.7

708

30

94.2

695

30.5

95.8

684

31

97.4

672

31.5

99.0

661

32

100.5

651

32.5

102.1

640

33

103.7

630

33.5

105.2

621

34

106.8

611

34.5

108.4

602

35

110.0

593

35.5

111.5

585

36

113.1

576

36.5

114.7

568

37

116.2

560

37.5

117.8

553

38

119.4

545

38.5

121.0

538

39.5

124.1

524

40

125.7

517

45.5

142.9

453

46

144.5

448

53

166.5

388

53.5

168.1

384

54

169.6

381

*Based on approximate loaded radius.

This is Mickey Thompson General Technical Bulletin #3.
Revised 6/3/09
For more information regarding Mickey Thompson Performance Products
Website: mickeythompsontires.com
E-mail: tech@mickeythompsontires.com
Phone: 330.928.9092

 
4. Mickey Thompson Metric Conversion Charts

MICKEY THOMPSON® METRIC CONVERSION CHARTS
 
Example: 235/70R15

235 = Section width in millimeters
70 = Aspect ratio (ratio of section height to section width)
15 = Rim diameter
R = Radial Construction B = Bias Construction D = Bias Belted Construction

To calculate:

Tire Width: Section width divided by 25.4 (Ex: 235 / 25.4 = 9.25″)
Section Height: Tire width times aspect ratio (Ex: 9.25″ x 70% = 6.48″)
Overall Diameter: Section height times 2 plus rim diameter (Ex: (6.48″ x 2) + 15 = 27.96″)

Therefore, a 235/70R15 is approximately 28″ tall x 9.25″ wide.



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IMPORTANT
There are many variables that affect a tire width such as rim width, air pressure, sidewall constructions, etc. just to mention a few. Please feel free to use these charts as a guide only. If you are trying a custom fit and our tire looks like it may be a tight fit, contact the M/T® Tech Department and we will be happy to help you with your fitment issues.

 
 
 

This is Mickey Thompson General Technical Bulletin #4.
Revised 6/30/09
For more information regarding Mickey Thompson Performance Products
Website: mickeythompsontires.com
E-mail: tech@mickeythompsontires.com
Phone: 330.928.9092

 
5. Tire Inflation - Nitrogen
TIRE INFLATION – NITROGEN
 

PLEASE READ!

Nitrogen inflation in tires is gaining popularity in the light vehicle (passenger and light truck) market. Nitrogen inflation in tires is not new to the tire industry however, and has been used under severe service conditions such as in large off-road tires, aircraft tires (as fire prevention) and racing tires for many years. Nitrogen inflation does not harm tires nor does it affect the warranty.

One of the most important factors in tire care is maintaining proper inflation pressure. The proper tire inflation for a vehicle is specified by the vehicle manufacturer and can usually be found on the tire placard (or sticker) attached to the vehicle door edge, door post, glove box door or fuel door as well as the vehicle owner’s manual. Proper tire inflation, whether nitrogen or normal air, helps tires wear longer, saves fuel and helps prevent accidents. Under inflation, regardless of the inflation gas, can make it harder to steer and stop your vehicle, result in loss of vehicle control, cause sudden tire destruction, and lead to serious injury or death.

Nitrogen inflation will not prevent damage or loss of inflation due to road hazards. Nitrogen inflation will also not prevent tire damage due to under inflation, overloading of off road service. Tire inflation should always be checked and adjusted to proper inflation pressure on a regular basis (at least monthly and before long trips), regardless of the inflation gas, to provide optimum tire performance.

 

This is Mickey Thompson General Technical Bulletin #5.
revised 12/8/2011
For more information regarding Mickey Thompson Performance Products
Website: mickeythompsontires.com
E-mail: tech@mickeythompsontires.com
Phone: 330.928.9092

 
6. Tires and Tubes Affected By Flood Waters
TIRES AND TUBES AFFECTED BY FLOOD WATERS
 

PLEASE READ!

The Mickey Thompson Tires and Wheels Company recommend the following with the respect to tires and inner tubes that have been exposed to flood waters. Flood water contains contaminants such as oil, grease, salt and other contaminants which can be damaging to tires and tubes. This recommendation applies to all types of tires including passenger, light truck, truck, off-the-road and agricultural tires:

  1. Tires that are currently mounted on vehicles that have been exposed to flood water should be cleaned and inspected for physical damage such as cuts, tear holes, or scrapes which might allow contaminants into the tire. Tires should be cleaned using a mild vegetable based soap and non- pressurized clean water. A pressure washer should never be used to clean tires. If the tire damage is present, the tires should be discarded. If no physical damage is found, the tires may be returned to service.
  2. Due to the likelihood of damage to the inner structure of a tire by contaminants, un-mounted tires that have been immersed in flood water should be discarded. All other un-mounted tires should be inspected for debris damage by a qualified tire professional before being placed in service.
  3. Inner tubes that have been exposed to flood waters should also be discarded.

 

This is Mickey Thompson General Technical Bulletin #6.
revised 12/8/2011
For more information regarding Mickey Thompson Performance Products
Website: mickeythompsontires.com
E-mail: tech@mickeythompsontires.com
Phone: 330.928.9092

 
7. Tire Mixing
TIRE MIXING
 

When tires need to be replaced, do not guess what tire is right for the vehicle. You must consult the tire placard, which is normally located on the vehicle door edge, door post, glove box or fuel door. The placard tells you the size of the tires (including the spare) that were mounted on the vehicle as original equipment (OE). It also includes the recommended cold inflation pressures for the front/rear axles and the spare tire as well as the load capacity. If the vehicle does not have a placard, check the owner’s manual or consult with the vehicle manufacturer or tire manufacturer.

IMPORTANT: Always check the vehicle manufacturer’s recommendations for the OE tire size, load capacity, inflation pressure, and speed symbol information before replacing a tire with a different size and construction. It is not always possible – usually due to temporary emergency conditions – to select the same tire size for a replacement tire. Never choose a smaller size replacement tire and/or a tire with less load carrying capacity than the specified size on the vehicle placard.

The RMA provides the following insight for emergency/temporary nonstandard fitments:

The following is a passage from the RMA Replacement Guidelines for Passenger & Light Truck Tires manual.

TIRE MIXING

It is recommended that all four tires be of the same size, speed rating, and construction (radial, non-radial). In some cases the vehicle manufacturer may require different sized tires for either the front or rear axles. NEVER mix P-Metric or European Metric passenger tires with light truck sized tires on the same vehicle.

Match tire size designations in pairs on an axle, except for temporary use of a spare tire. (See Mickey Thompson Tech Bulletin #15 “Replacing Less Than Four Tires”).

If two radial tires and two non-radial tires must be used on a vehicle, put radials on the rear axle. If radial and non-radial tires are used on a vehicle equipped with dual rear tires, the radial tires may be used on either axle.

  • Speed rated tires – If the vehicle tire placard and/or owner’s manual specify speed rated tires, the replacement tires must have the same or higher speed rating to maintain vehicle speed capability.
    • If replacement tires have lower speed capability than specified by the vehicle manufacturer, the vehicle’s speed must be restricted to that of the replacement tire. Also, vehicle handling could be affected. Consult vehicle manufacturer or tire manufacturer for recommendations – and consumers should know the speed must be restricted to the limits of the replacement tire.
    • With the exception of winter/snow tires (see below), if tires with different speed ratings are used, it is recommended that the lower speed rated tires should always be placed on the front axle. This is to prevent a potential oversteer condition.
  • Four-wheel drive (4WD) and All-wheel drive (AWD) vehicles-

  • If no instructions for tire mixing appear in the vehicle owner’s manual, follow these guidelines:

    • DO NOT mix tire sizes. All four tires must be marked with the same tire size, unless otherwise specified by the vehicle manufacturer. This also applies to winter/snow tires.
    • DO NOT mix radial and non-radial tires. All four must be either radial or non-radial.
    • DO NOT mix tread pattern types such as all-terrain and all-season.
  • Winter/Snow tires – It is always preferable to apply winter/snow tires to all wheel positions, including duals, to maintain vehicle mobility and control.

Should you wish to order copies of RMA Replacement Guidelines for Passenger & Light Truck Tires manual, you should contact RNA at the following address:

RUBBER MANUFACTURERE ASSOCIATION
PUBLICATIONS DEPARTMENT
1400 K STREET, N.W.
WASHINGTON, D.C. 20005
PHONE 800-325-5095

This is Mickey Thompson General Technical Bulletin #7.
revised 12/8/2011
For more information regarding Mickey Thompson Performance Products
Website: mickeythompsontires.com
E-mail: tech@mickeythompsontires.com
Phone: 330.928.9092

 
8. Safety Warning – Speed Rated Tires
SAFETY WARNING – SPEED RATED TIRES
 

PLEASE READ!

Introduction

The following is current information regarding speed rated tires. Please note that many of today’s vehicles are equipped with speed rated tires. Please not that many of today’s vehicles are equipped with speed rated tires. It is NOT recommended that tires on these vehicles be replaced with tires which exhibit a lower speed rating than those specified by the vehicle manufacturer.

Safety Rules for Selection, Mixing, Repairing, Retreading, or Alteration of Speed Rated Tires

It is important, for the safety of the consumer, that the following safety rules be followed in the selection, mixing, and servicing of speed rated tires.

A. When replacement of tires is desired, consult the placard (normally located on the door frame or glove box door) or the owner’s manual for correct size. If the tires shown on the vehicle placard do not have speed ratings, the appropriate size tire with any speed rating may be applied, if desired. When the placard tire size nomenclature contains a speed symbol, for example P205/60HR15, the replacement tire must have the same or higher speed rating symbol if the speed capability of the vehicle is to be maintained. IF THE REPLACEMENT TIRE IS NOT SPEED RATED, OR HAS A LOWER SPEED RATING THAN INDICATED ON THE VEHICLE PLACARD, THE SPEED CAPABILITY OF THE VEHICLE IS LIMITED BY THE SPEED CAPABILITY OF THE REPLACEMENT TIRE. A Mickey Thompson produced dot tire without a speed rating has a max highway speed of 85 mph.

Follow the recommendations contained in RMA publications for other considerations in the selection of replacement tires.

B. Mixing

IF TIRES OF DIFFERENT SPEED RATINGS ARE MOUNTED ON A VEHICLE, THE TIRE WITH THE LOWEST SPEED RATING WILL LIMIT PERMISSIBLE TIRE RELATED VEHICLE SPEED.

If any replacement tire is not speed rated, the speed capability of the vehicle is limited by the maximum speed of that tire (85 mph for Mickey Thompson produced tires).

C. Retreading, Repairing , or Alteration of Speed Rated Tires

SPEED RATING NO LONGER APPLIES TO A MICKEY THOMPSON PRODUCED TIRE THAT HAS BEEN ALTERED (for example, by retreading or repairing).

 

This is Mickey Thompson General Technical Bulletin #8.
revised 12/8/2011
For more information regarding Mickey Thompson Performance Products
Website: mickeythompsontires.com
E-mail: tech@mickeythompsontires.com
Phone: 330.928.9092

 
9. Passenger and Light Truck Used Tires
PASSENGER AND LIGHT TRUCK USED TIRES

Below is a link to the Tire Information Service Bulletin by the Rubber manufacturers Association (RMA) regarding previously used tires on a passenger or light truck vehicle. Anyone who is considering the purchase and/or installation of used tires, especially used tires with an unknown history, should read the bulletin carefully.

Passenger and Light Truck Used Tires (Pub #: TISB-45/3-0908)

Consumers should be aware of possible serious risk associated with the installation and use of previously used tires. While tires are designed and built to provide many thousands of miles of excellent service, they must be maintained properly throughout their service life to achieve optimal performance. Proper tire maintenance includes regular (at least monthly) visual tire inspections for signs of damage or abuse (ie. Cuts, cracks, bulges, snags, irregular wear, etc.) and inflation pressure checks. Tires can be damaged over the course of their service life due to abuse or improper service, maintenance, repair, or storage conditions, and such damage can eventually lead to tire failure. Only the original owner of a new tire can know the full extent of a particular tire’s service and maintenance, and the conditions of use or abuse the tire has experienced. Thus, Mickey Thompson Tire fully endorses the RMA Tire Information Service Bulletin, “Passenger and Light Truck Used Tires”.

Mickey Thompson urges that used tires should not be purchased, sold, or installed if they exhibit any of the conditions listed in the RMA bulletin, or if the used tires are offered by anyone other than a qualified tire service professional at a reputable new tire sales facility. Also, it should be noted that any used tire deemed not suitable for immediate service is also not suitable for spare tire applications. When a faulty spare tire is eventually used, it will be dangerous in service.

Consumers should also be wary of used tires that:

  • May have been used on vehicles involved in an accident
  • May have been used in sever service conditions (e.g. used for off-road, sporting, military or law enforcement purposes)
  • May have been exposed to unusual environmental conditions such as sever storms, floods, fires, etc>

This is Mickey Thompson General Technical Bulletin #9.
revised 12/8/2011
For more information regarding Mickey Thompson Performance Products
Website: mickeythompsontires.com
E-mail: tech@mickeythompsontires.com
Phone: 330.928.9092

 

Street & Strip Tech Bulletins

1. Mickey Thompson Drag Slick Compound and Burnout Specification Sheet
DRAG SLICK COMPOUND AND BURNOUT SPECIFICATION SHEET
 
CURRENT COMPOUND SELECTION AND APPLICATION GUIDE
The compound number can be found in the serial number on each tire.

EXAMPLE: CY1J M5 FJ087 M5-Compound code.

Mickey Thompson tires are compounded by size and application. The following points are general application suggestions. Mickey Thompson is not responsible for misapplications.
The catalog number suffix indicates a construction, size or compound enhancement for particular applications.

R = Radial construction
M = Motorcycle
C = FWD / Sport Compact
ST= Suggested for manual transmission (Medium compound – M5)

W= Extra tread width (please note actual tread and section width on spec sheet)

S= Stiff sidewall construction. Recommended for 4 link suspension cars, heavy cars (over 3000lb.), and “soft ride” Rear Engine Dragsters. Can aid in quicker reaction times due to less tire distortion.

MICKEY THOMPSON COMPOUND SELECTION CHART
Medium———————————————————-Soft
            M7 M5 M8 R2 R1 L8 L7       B2 L4 M2

B2 – For motorcycles.
L4 – Soft compound for Dragsters, lightweight vehicles and vehicles without rear suspension.
L7 – For motorcycles.
L8 – Good compound for general use.
L2 – For Jr. Dragsters.

M5 – Good compound for general use.
M7 – Good compound for general use.
M8 – Aggresive Compound for Index Racing, Works Well in All Ambient and Track Conditions.
X5 – Cooler running version of M5.
X7 – Cooler running version of L7.

X8 – Cooler running version of L8.

R1 – Special Compound for ET Drag Radial.
R2 – Special Compound for ET Street Radial.

BURNOUTS– FOR MOST APPLICATIONS
The length of your burnout will be dictated primarily by the ambient and track conditions. The hotter the temperatures, the shorter the burnout. When the temps get cool, a longer burnout will be necessary. Ideally you want the tire temp to be within 15 degrees of the track temperature on the launch. When the track temps exceed 120 degrees, it is always best to keep your tire temps on the lower side. Here are some additional tips for maximizing the performance of your M/T racing tires.

1. First pass of the day will be your longest. After that follow the guidelines of #2 and #3 stated below.
2. Automatic transmissions and Bias tires with Softer compounds: First pass or two, fairly hard burnout relative to ambient conditions. After that a light burnout should be sufficient.
3. Standard transmission and Radial tires: Typically shorter burnouts are better. A light burnout, enough to haze the tires, then stage immediately.
4. No dry hops. This does nothing to improve traction, and in some cases can have a negative effect.

This is Mickey Thompson DRAG / STREET Technical Bulletin #1.
Revised 5/26/09

For more information regarding Mickey Thompson Performance Products
Website: mickeythompsontires.com
E-mail: tech@mickeythompsontires.com
Phone: 330.928.9092

 

2. Mickey Thompson Natural Rubber Racing Tubes
MICKEY THOMPSON NATURAL RUBBER RACING TUBES
 

Besides being required for air retention, Mickey Thompson racing tubes can enhance reaction time, increase stability and helps the tire maintain the proper shape to reduce sidewall shock and deflection.

Note: Always run the correct size natural rubber tube for the application. The wrong tube type and size will always fail.

When buying tube type tires it is important to understand the reasons behind making a tire tube type and when it is appropriate to run the tire with or without a tube. The decision to run with or without tubes should be based on safety and performance, not cost.

 
The following information will elp in the decision making process
1. Air retension

Tube type tires are not guaranteed to hold air without a tube. If a tube type tire leaks, it is not defective. Tubeless tires use a liner molded into the carcass for air retention. This liner is usually omitted from racing tires, primarily for weight purposes.

2. Consistency
A tube aids in maintaining consistent air pressure. Therefore if consistency is the primary goal, as in Bracket Racing, a tube is always recommended.

3. Strength
The use of tubes makes the tires package more robust. This really comes into play with heavier vehicles running smaller tires. Because of this, they can extend the life of the tire saving money in the long run.

4. Weight & performance
In some cases it is acceptable to run a racing tire without a tube. When a car competes in a heads up class, unsprung weight, like a tire and tube, is an important factor This is especially true when it comes to a limited power combinations such as naturally aspirated engines. One pound of “unsprung” weight is equal to 8 pounds of “sprung” weight. Based on that, every 12 pounds of unsprung weight removed may gain as much as .01 seconds in quarter mile ET.

5. Cost
All M/T tubes are made of Natural Rubber and feature a clamp down valve stem. There are some inexpensive Butyl rubber tubes on the market, even with clamp down valve stems. Natural rubber is, by far, the better choice. It conforms to tire distortion better, dissipates heat, and it doesn’t get brittle like butyl rubber. Therefore M/T natural rubber tubes offer superior performance and will last far longer with the ability to be re-used.

6. Safety
At a racetrack you must check air pressure regularly. This is important to maintain performance and to insure pressures are not too low. Low pressure can be dangerous.
Never run tube type tires on the street without a tube. Leakage and the prolonged heat build up can lead to tire failure, serious injury or death. This is not a matter to take lightly.

MOUNTING PROCEDURES FOR TUBE TYPE TIRES

1. Check the valve stem hole in the rim. The hole must be 5/8″. Note: If necessary to drill the valve stem hole in the rim, make sure the rim is de-burred and free of material and sharp edges.

2. Before installing new tubes pre-inflate the tubes to the approximate diameter of the tire. This will aid in filling the entire cavity of the tire by giving the tube a “stretch”. Note: This will also aid in valve stem placement on wide rims where the valve stem is offset on the rim, but not on the tube.
3. Clean the bead and all interior surfaces of the rim.
4. Place wheel on tire changer following the equipment manufacturers instructions.
5. Mount bottom bead only on the wheel.
6. Insert tube in tire and partially inflate to make sure it is not “twisted”. It will help to lubricate the tube with baby powder. If you’re using a liquid lubricant on the bead, do not allow lubricant to run between the tire and the tube. DO NOT use anti freeze, silicones or petroleum based lubricants.
7. Align the tube valve with the valve stem hole in rim. Insert and center the stem in the hole.
8. Mount the top bead of the tire on the rim so that the bead in the valve area is the last part of the bead to go over the rim flange. Be careful not to pinch or move the tube. Re-center the valve stem, if necessary, by rotating both the tire and tube. After centering the valve stem install the valve stem clamp ring.
9. Inflate tire assembly slowly to seat tire beads. Do not exceed 35 p.s.i. to seat beads.
10. To prevent tube wrinkling, remove valve core to completely deflate the tube. Reinsert valve core and firmly seat it. It may be necessary to repeat this process to eliminate any wrinkles. Note: See second half of this bulletin for further details.
11. Reinflate assembly to proper pressure and check circumference of the tires to make sure they match before installing any rim screws into the tires. (See Tech Bulletin # 4 for proper installation of rim screws)
WHAT TO DO IF YOU FIND “LOW SPOTS” OR “WRINKLES” IN A TUBE TYPE TIRE
You may notice a “low spot” or “wrinkle in a tube type tire. (See diagram #2-A)This can be caused by one of the following:
A. Wrong tube size (too large or too small).

B. Faulty tube installation (wrinkles in tube).

To confirm the problem, you can do one of two things:
1. Break the tire down and rotate it on the rim. You’ll note that the low spot, if it is still there, has not moved.

2. Break the tire down and remove the tube. Install a valve stem and inflate the tire. You’ll note there is no low spot.

To correct the problem, first be sure the correct tube size is used. The proper tube is listed in the Mickey Thompson spec sheet. To eliminate wrinkles, the tube should be inflated and deflated during installation. If the wrinkle persists, you may need to lubricate the tube with baby powder and/or break the tire down and work the wrinkles out by hand.

Note: If the wrinkles are not removed or the wrong tube size is used, premature tube failure will occur.

Diagram #2-A:
Diagram #1:

This is Mickey Thompson DRAG / STREET Technical Bulletin #2.

Updated 5/27/09
For more information regarding Mickey Thompson Performance Products
Website: mickeythompsontires.com
E-mail: tech@mickeythompsontires.com
Phone: 330.928.9092

 

 
3. ET Street™, ET Street Radial® and ET Drag® Air Pressure Guidelines

ET STREET™, ET STREET RADIAL®, AND ET DRAG® AIR PRESSURE GUIDELINES
 
PROPER AIR PRESSURE
Proper air pressure is critical to the best performance of your ET Drag or ET Street racing tires. Mickey Thompson strongly suggests investing in a good tire pressure gauge and that you keep accurate and complete records of each pass. This will aid you in becoming a consistent performer. Recommending air pressure is not easy, since there are so many variables that affect it: i.e. weight distribution, transmission, chassis set-up, wheel size, etc. To help you, we have broken down the types of vehicles into the following categories with a recommended starting point for the correct air pressure. These pressures are for off-highway use only and based on optimum chassis and drivetrain setups. Keep in mind that these are purely starting points. Actual optimum air pressure may vary significantly. If you have been running another brand of slick on your racecar, we generally recommend you start with the same air pressure you were running and go up in ½ pound increments until you get the best performance. Most racers will usually end up with ½ to 2 pound more air pressure in a Mickey Thompson tire.

Note: Many racers feel that “Less is Better” with regard to air pressure. This is not always the case. While there are exceptions to every rule, we have found higher pressure generally works best with Mickey Thompson Tires. Not only do the higher pressures lead to quicker times, but they also contribute to a safer, more stable ride at the finish line.

 
 

 
ET DRAG® AND ET STREET™
 
VEHICLE WEIGHT

TIRE SIZE

AIR PRESSURE

UNDER 2,500 POUNDS
UNDER 2,500 POUNDS

UNDER 32″ DIAMETER
OVER 32″ DIAMETER

7 P.S.I. AND UP
5 P.S.I. AND UP

2,500 TO 3,000 POUNDS
2,500 TO 3,000 POUNDS
2,500 TO 3,000 POUNDS

UNDER 30″ DIAMETER
30-33” DIAMETER
OVER 33″ DIAMETER

10 P.S.I. AND UP
8 P.S.I. AND UP
5.5 P.S.I. AND UP

OVER 3,000 POUNDS
OVER 3,000 POUNDS
OVER 3,000 POUNDS

UNDER 30″ DIAMETER
30-33” DIAMETER
OVER 33″ DIAMETER

12 P.S.I. AND UP
8 P.S.I. AND UP
6 P.S.I. AND UP

 

 
PRO DRAG RADIAL
 
2,500 TO 3,000 POUNDS
2,500 TO 3,000 POUNDS

UNDER 30″ DIAMETER
OVER 30″ DIAMETER

16 P.S.I. AND UP
8 P.S.I. AND UP

OVER 3,000 POUNDS
OVER 3,000 POUNDS

UNDER 30″ DIAMETER
OVER 30″ DIAMETER

16 P.S.I. AND UP
12 P.S.I. AND UP

  • When working with ET Drag Radials use 1 psi adjustments to see change.
  • A radial will perform quicker the more air you can run.
 
 

 
ET DRAG MOTORCYCLE
 

MCR² (3295): Quarter Mile in 7 seconds, Turbo Bikes, 6 – 10 psi

Quarter Mile: in 8 to 9 seconds, 15 – 19 psi

Quarter Mile: High 9 seconds and slower, high twenties to mid thirties

3210 ET Front: 35-40 psi

3053M, 3158M (Pro Stock – Pro Mod): 4.0 – 6.0 psi, wheelie bar 2” – 2 1/8”

3064M: 4.0 – 6.0 psi, Wheelie bar 2” – 2 1/8”

3065M: 6.0 – 9.0 psi, Wheelie bar 1 ¾”

3073M: 7.0 – 8.0 psi, Wheelie bar 1 ¾”

3220: 7.5 – 10 psi, Wheelie bar 2” – 2 1/8”

3221, 3222: 6.5 – 8.0 psi, Wheelie bar 2” – 2 1/8”

These recommended pressures are guidelines only, actual pressures may vary. Wheelie bar settings are with the front end extended and can vary as well.

 
 

 
ET STREET RADIAL
 

On the racetrack DO NOT use starting pressures below 11 psi.

Recommend pressures for:

P295 and larger sizes: 12-16 psi

P275 and smaller sizes: 14-18 psi

For suggested highway use inflation pressure in Mickey Thompson ET Street Radial tires, contact the Mickey Thompson Tires tech department at (800) 222-9092.
Please have your OE specified tire size and OE cold inflation pressure (located on the vehicle’s tire placard), as well as the new tire size available for the tech staff.

 
 

 
ET DRAG JR.
 

3621: 4 – 8 psi

3644: 4 – 8 psi


The technical information provided in this document is to be used purely a guideline. Due to the many varied and different conditions to which racing tires, wheels and tubes are exposed, and because of the manner in which racing is conducted, Mickey Thompson Performance Tire makes absolutely no warranty, expressed or implied, as to the fitment for a general or particular purpose. Racing Tires are Sold As Is.

This is Mickey Thompson DRAG / STREET Technical Bulletin #3.
Updated 5/29/09
For more information regarding Mickey Thompson Performance Tire and Wheels
Website: www.mickeythompsontires.com
E-mail: tech@mickeythompsontires.com

Phone: 330.928.9092

 
4. Mickey Thompson® Procedures for Securing Tires to Wheel Assemblies

MICKEY THOMPSON PROCEDURES FOR SECURING TIRES TO WHEEL ASSEMBLIES
 
RIM SCREWS OR BEADLOCKS
Mickey Thompson recommends that wheel widths should not exceed 1” wider than the tread width. If you elect to use rim widths 1-2” wider than the tires tread width, M/T strongly suggests increasing the number of rim screws to 16 per side or beadlocks. Beadlocks only are recommended on any wheel widths that exceed 2” wider than the tires tread width or if speeds exceed 200 MPH. Some M/T tires have “Beadlocks Recommended” stamped on the sidewall of the tire.

 
PROPER INSTALLATION OF RIM SCREWS WITH TUBE TYPE TIRES
1. Begin by drilling 12 equally spaced holes on both the inner and outer flange of the rim. See the diagram 4-A below.

Note: (Mickey Thompson strongly suggests that you use Drag slick mounting screws only, and that you follow the rim screw manufacturers suggested drill bit size.)

2. Trial run the screws through all 24 (32) holes. Running screws in the hole and back out again. A dab of grease on the screw will help.
3. Check for any sharp edges that the screw may have pushed out or caused during the trial run through. If any sharp edges are found de-bur and make sure the inner bead flange of the rim is smooth and clean.
4. Mount tire and tube. Have an experienced professional install the tire and tube on proper equipment. (Refer to Mickey Thompson Tech Bulletin #2 for tube mounting procedures and Mickey Thompson Tech Bulletin # 8 for proper procedures to check rollout (circumference).
5. Before installing the screws, inflate the wheel and tire assembly to 20 psi. Put a small amount of grease on each screw and install into wheel and tire assembly. Deflate assembly to operating pressure. Inspect rim flange and bead area for proper bead seating. If bead is not fully seated, re-inflate and reinstall screws.
6. For best results, static balance or “Bubble Balance” the assembly once screws are installed.
7. Periodically you should check the wheel for loose screws and inspect the rim bead area to be sure that there is no bead area separation.

Note: It would be good practice to inspect after each pass when you are checking your air pressure.

Diagram #1:
DIAGRAM 4-A
 
PROPER USE OF MICKEY THOMPON ET STREET RADIAL
 
Bead/Wheel Slippage
Some bead/wheel slippage (1/2” or less) may result during the course of a 1/4 mile (or 1/8 mile) drag race. This is normal. Check for tire slippage when you check your tire pressure after each pass. An easy way to monitor slippage is to put a small mark on tire near the bead just above the valve stem on the wheel. After a few runs, the tire should stop moving on the rim.
 
Excessive Rim Slip
If continued or excessive (more than ½” to 1”per run) wheel/slip is experienced, Mickey Thompson recommends the use of “Beadlock” wheels for ET Street Radials. Bead screws are not recommended and could lead to tire failure and or damage.
 

The technical information provided in this document is to be used purely a guideline. Due to the many varied and different conditions to which racing tires, wheels and tubes are exposed, and because of the manner in which racing is conducted, Mickey Thompson Performance Tire makes absolutely no warranty, expressed or implied, as to the fitment for a general or particular purpose. Racing Tires are Sold As Is.

This is Mickey Thompson DRAG / STREET Technical Bulletin #4.
Updated 5/29/09
For more information regarding Mickey Thompson Performance Tire and Wheels
Website: www.mickeythompsontires.com
E-mail: tech@mickeythompsontires.com

Phone: 330.928.9092

 
5. Mickey Thompson® ET Drag® and ET Street™ Extended Storage or Winter Storage

MICKEY THOMPSON® ET DRAG® AND ET STREET™ EXTENDED STORAGE OR WINTER STORAGE
 
STORAGE PROCEDURES AND TIPS
1. Remove the tires from the car or jack the car up to remove the load.
2. Drop air pressure to 5 pounds.
3. Keep the tires away from direct light (sun or fluorescent). It is best to keep tires covered.
4. Keep tires away from electric motors I.E. furnace, air compressor, etc. These create OZONE, which will damage the tire.
5. Mickey Thompson suggests that you keep tires away from extreme high and low temperatures.
6. Do not use any chemicals on the tires. To clean them use a mild detergent and water. Rinse well. Do not clean the tread surface.

By following these simple precautions you will get the best service from your tires. If you experience inconsistent 60′ & 330′ times the next season, it’s probably time to replace the tires.


This is Mickey Thompson DRAG / STREET Technical Bulletin #5.

For more information regarding Mickey Thompson Performance Tire and Wheels
Website: www.mickeythompsontires.com
E-mail: tech@mickeythompsontires.com

Phone: 330.928.9092

 
6. Proper Measurement of M/T ET Drag AND ET Street (Bias Tires)

PROPER MEASUREMENT OF M/T ET DRAG AND ET STREET (Bias Tires)
 
Click Here for PDF Version
 
Proper measurement of a tire is very important when choosing a tire as it will affect many things such as engine R.P.M., vehicle fitment, roll out and ground clearance issues.
 
ROLLOUT (CIRCUMFERENCE)
Roll out is the number of inches the tire rolls before it has traveled back to its initial starting point as shown below.
 
 
A tire can be measured for circumference or roll out by using a tape measure. Start by laying the mounted and inflated tire on its side. Wrap the tape measure around the tire going around the center part of the tread pattern.
 

Our bias race tires (ET Streets and ET Drags) are made with a nylon construction. For this reason, it is necessary to use the following procedure for checking the rollout (circumference) of tires when they are first mounted. Always check the size before installing rim screws or putting the tires in use.
Before mounting the tires, we recommend checking the date codes (Refer to General Tech Bulletin # 1 (LINK)). A natural characteristic of nylon is to shrink over an extended period of time. The dates should be within six months to help ensure close measurements. If they do not, please contact your dealer or point of purchase.

After mounting the tires, take the air pressure to 20 psi then immediately drop to the pressure you plan to use at the track (example – 12 PSI). Important, never let one tire sit at a higher air pressure for an extended period of time. To clarify, do not air one tire up, drop it immediately, then let the other tire sit at 20 psi for while. This will give inaccurate numbers as one will have stretched. Before the tires are run they should always have the same air pressure for the same amount of time unless you are trying to stretch it.

Tires must be matched within ½” maximum before they are run. If they exceed this difference, it can usually be corrected. This is done by over inflating the shorter tire and letting it sit a short period of time to allow it to stretch. It is very important to monitor this procedure to avoid stretching too much. When stretching tires always drop them back to “0” psi,, then back up to your track pressure. This will show if it has actually stretched or not. This should be done as close to running the tires as possible. Never inflate tires over 40 PSI to stretch them. If you cannot get the tires to match, please contact your dealer. Mismatched tires exceeding ½” cannot be exchanged if:

  • This procedure has not been followed.
  • The tires have been put into use.
  • Rim screws have been installed.

Again, this procedure will only work before a tire has been used.

 
 
 
 
Overall Diameter (O.D.)
O.D. is the measurement of a tire diameter and is taken from the top of the tire to the bottom of the tire. Note: The O.D. of a tire is measured with the tire off of the vehicle, not under load and at appropriate air pressure. The most accurate way to calculate the OD of a tire is measuring the circumference and dividing by 3.1416”. (Example: Circumference = 88.0” ; therefore 88.0 divided by 3.1416 = 28.01”) Knowing the O.D. of a tire will aid in fitment issues and can assist in gear ratio and speedometer corrections.

 

All Mickey Thompson® tires are listed in our specification sheets with an O.D. (overall diameter) or circumference. These measurements are derived in the following manner . . .


M/T® Slicks:
All tires taken to 20 PSI then:
Measuring rim at 10 psi cold.
(Exception: 33″ drag @ 6 psi)

This is Mickey Thompson DRAG / STREET Technical Bulletin #6.
Updated 5/29/09
For more information regarding Mickey Thompson Performance Tire and Wheels
Website: www.mickeythompsontires.com
E-mail: tech@mickeythompsontires.com

Phone: 330.928.9092

 
7. Backspacing and Offset

BACKSPACING AND OFFSET
 
 

Backspace and offset are two ways of describing where the wheel sits in relationship to the hub. As such, there is a relationship between the two making – it possible to convert from one to the other.

Backspacing is the easiest to understand. It is simply the distance from the back of the mounting pad to the back lip of the wheel. It is measured by laying the wheel on its face, placing a straight edge across the wheel, and then measuring down to mounting face. The higher this measurement the more the wheel is pushed inboard towards the car’s centerline, as shown in the illustration above.

Offset is the distance from the mounting surface to the centerline of the wheel, expressed in millimeters. Positive offset means that the wheels are pushed inboard towards the centerline of the car like a car with front wheel drive. Negative means that the wheels are moved outboard towards the fenders, widening the track.

 
TO CONVERT OFFSET TO BACKSPACING:

For positive offset wheels: (Wheel Width +1)/2 + (offset * .03937)

For negative offset wheels: (Wheel Width +1)/2 – (offset * .03937)

 
TO CONVERT BACKSPACING TO OFFSET:

Backspacing – (Wheel Width + 1)/2 * 25.4 = offset

Round this result to the nearest milimeter. If the answer is a negative number the wheel has negative offset, if positive then a positive offset.

 

This is Mickey Thompson DRAG / STREET Technical Bulletin #7.
For more information regarding Mickey Thompson Performance Tire and Wheels
Website: www.mickeythompsontires.com
E-mail: tech@mickeythompsontires.com

Phone: 330.928.9092

 
8. Tire use on a Dyno

TIRE USE ON A DYNO
 
Mickey Thompson tires which have been subject to use on a Dyno must no longer be used for subsequent, normal service. Use of Mickey Thompson tires on a Dyno will invalidate the tire warranty.
 
At no time should the following Mickey Thompson tires be used on a Dyno:
  • ET Drag
  • ET Motorcycle
  • Pro Drag Radials
  • ET Street
  • ET Street Radial
  • ET Street Radial II
 

This is Mickey Thompson DRAG / STREET Technical Bulletin #8.

For more information regarding Mickey Thompson Performance Tire and Wheels
Website: www.mickeythompsontires.com
E-mail: tech@mickeythompsontires.com

Phone: 330.928.9092

 

Truck & Off-Road Tech Bulletins

1. Tire-Wheel Match Mounting for Optimum Uniformity
TIRE-WHEEL MATCH MOUNTING FOR OPTIMUM UNIFORMITY
 
Typical details and procedures for proper match mounting are as follows:
 
Rim Details:
  New passenger and light truck vehicles:
   
  (A) Ford and Chrysler passenger and LT steel rims, and most steel replacement rims, have a paint dot or small painted daub in the drop well portion of the rim at the rim low spot.
  (B) GM and most Japanese vehicle manufacturers use the valve hole to mark the low point.
  (C) Other manufacturers are using a removable colored sticker or a brightly colored washable paint mark on the rim flange area of the rims. These are generally removed by the vehicle dealer upon sale of the vehicle.
  Aluminum and polycast rim low spots are located at the valve hole.
  Unmarked rims of all types generally have the low spot at the valve hole.
 
Procedures:

One tool that is currently in the market to assist in predicting ride/vibration response is the Hunter GSP9700/9712. This tool can approximate the low point of the wheel and the high point of the tire. Allowing the tire to be match mounted to the wheel makes the Hunter GSP9700 is an excellent tool to minimize road force variation of the tire/wheel assembly.

The Hunter GSP9700/9712 should not be used to predict or determine tire uniformity values or if a tire or wheel meets a radial force specification. Mickey Thompson does not rely solely on the values obtained from radial force machines when considering adjustments

 
Mounting:

Lube both tire beads and the rim on both outer flanges (where the bottom of the tire beads will make contact with the flat portion of the rim when seated).

Proceed with assembly, mounting and balancing in accordance with RMA procedures.

After the beads have been seated, visually check the positioning of the tire bead aligning rings molded into the tire. If spaced uniformly around the rim above the flange, the tire is properly positioned on the rim. If the tire is not positioned properly on the rim, deflate the tire and relube both tire beads and the rim before proceeding with reassembling.

The paint marks on Mickey Thompson Tires are not indications of tire high or low spots and are merely marks applied for production purposes only.

On dual tires, each tire/wheel assembly should be installed with the valve 180 degrees opposite each other.

Mickey Thompson recommends tires be dynamically (spin) balanced.

This is Mickey Thompson TRUCK / OFF-ROAD Technical Bulletin #1
Updated 10/25/10
For more information regarding Mickey Thompson Performance Tire and Wheels
Website: www.mickeythompsontires.com
E-mail: tech@mickeythompsontires.com

Phone: 330.928.9092

 
2. The Importance of Proper Front End Alignment

THE IMPORTANCE OF PROPER FRONT END ALIGNMENT
 

It is important to remember that when installing wider tires and/or wider wheels with more negative offset than factory and when ride height is changed, especially on late model IFS (Independent Front Suspension) equipped foreign & domestic P/U’s & SUV’s, it also changes alignment settings and load on the steering components.

When front-end alignment goes uncorrected, it shows up on the tread surface of tires which have excessive wear to the inside or outside portion of the tread. The same can be said of tires with a ‘chopped’ and/or ‘feathered’ look to the tread. Most often, we can trace tires requested for adjustment due to “fast tread wear” back to a vehicle with poor or uncorrected front-end alignment.

Here is the way to avoid this unwarrantable problem:

 
Rim Details:
1. Correct changes in front end alignment due to torsion bar or spring adjustment, lift or lowering kit installation, severe off road use, wheel width and/or offset or some combination of the above.
Note: Brand name suspension manufacturers and vendors always recommend front-end alignment after lift or lowering kit installation or suspension height adjustments.
2. While a steering stabilizer is a good idea with the installation of any tire/wheel combination larger than OE, and may disguise the ‘feel’ (darting, hunting, wandering, wheel shimmy) that goes along with poor alignment, it will not fix this. Only a competent alignment to suggested specs is sufficient. This may also mean replacing worn suspension/steering components such as ball joints, tie-rod ends, idler/pitman arm, control arm bushings and wheel/axle bearings. Even on low mileage vehicles, this is important, due to the possibility of low quality original equipment components.
 

Finally, vehicles with oversize tires and wheels may need more frequent alignments, due to increased load on suspension and steering components. Proper maintenance and alignment will not only increase tire life and driveability, it will also extend the life of suspension and steering components.

Bottom line = Check your vehicle for worn suspension/steering components before/when suspension height is altered and geometry changed; after worn components replaced, if any needed, get it aligned. Tires being adjusted for fast/uneven tread wear on vehicles with poor alignment will not be warranted.

 

This is Mickey Thompson TRUCK / OFF-ROAD Technical Bulletin #2
For more information regarding Mickey Thompson Performance Tire and Wheels
Website: www.mickeythompsontires.com
E-mail: tech@mickeythompsontires.com

Phone: 330.928.9092

 
4. Maintaining M/T Classic II and Classic Lock Wheels

MAINTAINING M/T CLASSIC II, CLASSIC III, CLASSIC BIG RIG AND CLASSIC LOCK WHEELS
 
M/T Classic II, Classic III, Classic Big Rig and Classic Lock wheels are not clear or powder coated. This means that the end user must maintain their wheels to preserve that “out of the box” look. There is no warranty on the finish on M/T Classic II, Classic III, Classic Big Rig and Classic Lock wheels, so it is important that you take the time to keep your wheels looking good. The follow procedures will help you.
 
Rim Details:
1. Only wash your wheels with mild soap and water, then hand dry with a soft towel. Some commercial wheel cleaners and soaps, both for home use and at car washes, use acid or caustic chemicals and will damage the wheels. Wash as often as needed to remove brake dust and road dirt and grime before it accumulates on your wheels.
2. When you first get your wheels and at least after every fourth wash you should wax them with a wax developed for custom wheels. This will help seal the pores and prevent corrosion.
3. In areas where salt or sand is used on the roads in the winter, the wheels should be removed and stored until winter ends.
4. We provide steel center caps free of charge with every wheel purchase. These caps will rust under harsh conditions. However, aluminum center caps are available at an extra cost.
5. If corrosion has occurred on your wheels there are several off the shelf products that will help to restore the factory finish. Another option is to use 000 steel wool and WD40 to remove the corrosion, washing, and then polishing the wheel to restore their luster.
 
With just a little bit of effort on your part you will keep your wheels looking like new for years to come.
 

This is Mickey Thompson TRUCK / OFF-ROAD Technical Bulletin #4
For more information regarding Mickey Thompson Performance Tire and Wheels
Website: www.mickeythompsontires.com
E-mail: tech@mickeythompsontires.com

Phone: 330.928.9092

 
5. Tire Inflation Pressures

TIRE INFLATION PRESSURES
 

Federal regulations make it mandatory for tire manufacturers to place permanent data on the side of all tires showing maximum load and inflation. The inflation pressure shown is the “maximum” allowable under any circumstance. The maximum pressure is the uppermost limit and it is necessary only when heavy loads are carried in order to achieve the full safe load carrying limit of the tire, or when sustained periods of high speed driving are expected.

The pressure listed on the tire sidewall is the maximum pressure to be used for the tire. It is not intended as a guide for normal inflation pressure. If the vehicle is equipped with a tire that is the same “size” as the OE tire, has the same max pressure rating and has the same load index always check the vehicle manufacturer’s information on inflation pressures before inflating any tire. This is typically located on the vehicle tire placard.

The user may need to make adjustments to air pressure if the tire size or service description differs from what the vehicle was originally equipped with. For suggested air pressure in the Mickey Thompson Tires used on the vehicle, refer to the information in the Tech Bulletin section or contact the Mickey Thompson Tires tech dept. at (330) 928-9092 and have your OE tire size ( located on the vehicle placard), OE cold inflation pressure (located on the vehicle placard), and new tire size available for the tech staff.

When high speed driving and /or driving with maximum load as prescribed by the vehicle manufacturer), it is most important to follow the auto manufacturer’s recommendation for increasing tire pressure. However, do not ‘bleed’ or reduce pressure when the tires are hot from driving. Over-inflation may produce a harsh ride, which may make tires susceptible to impact damage and may cause faster than normal tread wear and may cause traction and cornering capabilities to decrease. Under-inflation may cause excessive heat build-up, which could cause tire failure.

 

This is Mickey Thompson TRUCK / OFF-ROAD Technical Bulletin #5
Updated 08/6/2010
For more information regarding Mickey Thompson Performance Tire and Wheels
Website: www.mickeythompsontires.com
E-mail: tech@mickeythompsontires.com

Phone: 330.928.9092

 
6. Replacing Less Than Four Tires

REPLACING LESS THAN FOUR TIRES
 

When replacing tires on a vehicle, it is recommended and preferred that all four tires be replaced at the same time for continued optimal vehicle performance. However, for those cases where this is not feasible, below are some general guidelines to consider when replacing less than four tires for a light vehicle, whether it is one or two tires. If the vehicle manufacturer has alternate recommendations, always follow their recommendations.

 
IMPORTANT
In some cases, the vehicle manufacturer may specifically advise against replacing less than all four tires. Always check and follow the recommendations in the vehicle owner’s manual. For 4WD and AWD vehicles, even small differences in outside diameter may cause drive-train damage or mechanical malfunction.

Replacing Two (2) Tires – When a pair of replacement tires is selected in the same size and construction as those on the vehicle, the two newer tires should be installed on the rear axles unless the new replacement tires are of a lower speed rating (see Mickey Thompson Tech Bulletin #14 “Tire Mixing”). Generally, new tires with deeper tread will provide better grip and evacuate water more effectively, which is important as a driver approaches hydroplaning situations. Placing greater traction on the rear axle on wet surfaces is necessary to prevent possible oversteer condition and possible loss of vehicle control, especially during sudden maneuvers.

Replacing One (1) Tire – Replacing a single tire on a vehicle can have adverse affect on suspension systems, gear ratios, transmission, and tire treadwear. If single tire replacement is unavoidable, it is recommended that the single new tire be paired with the tire that has the deepest tread and both be placed on the rear axle. Placing greater traction on the rear axle on wet surfaces is necessary to prevent a possible oversteer condition and possible loss of vehicle control, especially during sudden maneuvers.

 

This is Mickey Thompson TRUCK / OFF-ROAD Technical Bulletin #6
Updated 08/26/2010
For more information regarding Mickey Thompson Performance Tire and Wheels
Website: www.mickeythompsontires.com
E-mail: tech@mickeythompsontires.com

Phone: 330.928.9092