Dirt Midget Rules

All height measurements are from bottom of chassis unless otherwise noted.

General Rules:

  • General: Maximum Overall Length: 16.750".

  • Maximum Chassis Width: 4.2" Solid axles are allowed. If solid axles are used the rear axle must be square with centerline of the chassis and parallel to the front axle.

  • Wheelbase: Min 9.5” Max 10.0”

  • Width: Minimum = 8.5”; Maximum = 10.0”

  • Rear Toe: Only non-adjustable rear arms can be used. Trackside toe adjustable rear hubs and or arms are not allowed. Trackside adjustable wheelbase is not allowed (Cannot have toe blocks or anything else attached to an easily adjustable mechanism to allow for wheelbase change trackside).

  • Offset: Right side of the cage can be no further offset from the outside of the RR tire than 3.625”.

  • Ballast Weight: Brass, tungsten or steel hubs, arms, arm inserts, caster blocks, steering arms are not allowed. (Ballast weight that can be attached to the main chassis area is allowed as long as it’s secured properly.)

  • Transmission/Drivetrain: 3 gear transmissions only (No DD, 2, 4 or 5 gear transmissions will be allowed). All gears must be full gears. No narrowed or lightened gears allowed. Plastic, Aluminum and Steel gears are permitted. Steel outdrives only. Blades are permitted. No gear diffs allowed. No rear motor cars allowed unless you can do it in a manner that the tail tank is appropriately sized and located.

  • Solid Axle Option: If a solid rear axle design is used, the motor must be mounted to the chassis and CVA/CVD must be used to drive the rear axle. No belts or chains will be allowed. A spur gear and pinion must be used in conjunction with the motor plate mounted to the chassis.

  • CVA/CVD: Dog bones must be equal length. Axles and bones must be made from steel. No aluminum, titanium or magnesium axles or bones allowed.

  • No aluminum diffs or gear diffs.

  • Electronics ESC: Hobbywing Justock Speed Controller #30112003

  • Motor: Hobbywing 13.5T Justock #30408010

  • Battery: Any 2s Lipo

  • Tires: JConcepts Sprinters (any compound) or Quasispeed on 2.2 buggy wheels (no mixing of brands).

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