DEFINITION: Abnormal bounce or hop of the wheel under normal driving conditions.

Tire and wheel are out of balance

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

Tire and wheel are out of round

Replace the tire. Refer to Tire Description in Tires and Wheels.

Blister or bump on the tire

Replace the tire. Refer to Tire Description in Tires and Wheels.

Improper shock absorber action

Replace the shock absorber.

Excessive wheel or tire runout

Refer to Tire and Wheel Runout Measurement Vibration Diagnosis and Correction.