Stock class only exception. All tractors must be in good mechanical working order. The device must consist of 2 separate sections, each equipped with either a skid plate or wheels. Skid plates are to be at least 3 square inches at the ground contact point. Stabilizer bars shall be rigid enough to support the weight of the tractor.
Nothing can interfere with the hitch or sled chain.
Weights cannot interfere with hooking to the sled. Weights may be repositioned on a false start or re-pull. On sport stock and pro stock switch must disable ignition and electric fuel pump if equipped. Kill switch required on all tractors except stock class. On diesel engines the switch must activate an air shutoff.