 |  |  |  |  |  |
 |  |  |  |  |  |
| 2008 MODS will be UMP Sanctioned |
| 2008 UMP/Dirt Car Modified Rules Apply |
Tire rule may be amended by bulletin.
The UMP DIRTcar approved tire is the Hoosier A-40, D-40 or H-40 compounds in the UMP DIRTcar plated tire
26.5/8.0/15 or 27.5/8.0/15. Maximum width = 9" (nine inches).
Grooving is strictly prohibited on all tires. Only the A-40 and H-40 may have siping. Recapping of an approved tire is
not permitted.
A UMP DIRTcar official can confiscate any tire at any time and at any UMP DIRTcar track/event to be evaluated
including verification using a tire durometer. Tires that are found to be legal will be returned within a reasonable
period.
Defacing or altering any of the manufacturer's identification markings, letters, words, numbers, on any tire is strictly
prohibited. Tire compounds may be covered by duct tape as long as UMP DIRTcar officials are able to lift the covering
at any time. Any alteration of tires may result in immediate suspension from all UMP DIRTcar racetracks and penalties
deemed appropriate by UMP DIRTcar.
Tire softeners or chemicals designed to change the characteristics of the tire chemistry or surface are strictly
prohibited. Such chemicals or processes may result in an EPA investigation and force the closure of that racetrack.
Mud plugs are allowed on all four wheels. Bead locks are allowed on right side only.
Mud plug must have car number on it.
Only 8-inch racing wheels are allowed.
Wheels must be conventional one-piece steel and must be mounted with lug nuts. Aluminum, plastic or carbon fiber
wheels are NOT permitted. Must have five lugs.
Maximum overall width (front or rear) shall not exceed 78" (seventy-eight inches) from the outside of tread to outside
of tread. Maximum 1" (one inch) spacer between hub and wheel is allowed. Steel or aluminum spacer is allowed on
the front of the car only so long as overall width does not exceed 78" (seventy-eight inches).
The UMP DIRTcar approved tire is the Hoosier A-40, D-40 or H-40 compounds in the UMP DIRTcar plated tire
26.5/8.0/15 or 27.5/8.0/15. Maximum width = 9" (nine inches).
Grooving is strictly prohibited on all tires. Only the A-40 and H-40 may have siping. Recapping of an approved tire is
not permitted.
A UMP DIRTcar official can confiscate any tire at any time and at any UMP DIRTcar track/event to be evaluated
including verification using a tire durometer. Tires that are found to be legal will be returned within a reasonable
period.
Defacing or altering any of the manufacturer's identification markings, letters, words, numbers, on any tire is strictly
prohibited. Tire compounds may be covered by duct tape as long as UMP DIRTcar officials are able to lift the covering
at any time. Any alteration of tires may result in immediate suspension from all UMP DIRTcar racetracks and penalties
deemed appropriate by UMP DIRTcar.
Tire softeners or chemicals designed to change the characteristics of the tire chemistry or surface are strictly
prohibited. Such chemicals or processes may result in an EPA investigation and force the closure of that racetrack.
Mud plugs are allowed on all four wheels. Bead locks are allowed on right side only.
Mud plug must have car number on it.
Only 8-inch racing wheels are allowed.
Wheels must be conventional one-piece steel and must be mounted with lug nuts. Aluminum, plastic or carbon fiber
wheels are NOT permitted. Must have five lugs.
Maximum overall width (front or rear) shall not exceed 78" (seventy-eight inches) from the outside of tread to outside
of tread. Maximum 1" (one inch) spacer between hub and wheel is allowed. Steel or aluminum spacer is allowed on
the front of the car only so long as overall width does not exceed 78" (seventy-eight inches).
| TIRE RULE |
| 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. |