DEFINITION: The tire/wheel bounce with a frequency directly related to vehicle speed.

Tire/wheels are unbalanced

Balance the tire/wheels. Refer to Tire and Wheel Balancing in Vibration Diagnosis.

Tire exhibits a blister or bump

Replace the tire. Refer to Tire Mounting and Dismounting in Tires and Wheels.

Improper shock absorber action

Replace the shock absorber.

Excessive wheel or tire runout

Refer to Tire and Wheel Vibration in Vibration Diagnosis.

Tire lead/pull

Refer to Radial Tire Lead/Pull Correction in Tires and Wheels.