Smaller wheels need more frequent balancing than larger wheels because the speed of rotation is greater in smaller wheels. The distance between the front and the rear axles on a vehicle, motorcycle , or bicycle . The diameter of the opening in a disc which allows for protrusion of the axle hub. Also see brake backing plate . A hopping action of the rear wheels during heavy acceleration .
Traction is lost and regained in rapid cycles after power is applied to the rear wheels.
It indicates a need for different tires, better shock absorbers , better springs, better axle control, different driving technique, or all of the above. They are marked in fractions of an ounce or in grams. The distance between the center of the front wheels and the center of the rear wheels. Short arms attached to the rear of a drag racer to prevent the front end from rising too far off the ground during heavy acceleration . Arms are usually of spring material and have small wheels attached to the ends that contact the ground.