Runout Tests
Tire and Wheel RunoutBefore checking runout, and to avoid false readings caused by temporary flat spots in the tires, check runout only after the vehicle has been driven far enough to warm the tires.
Excessive radial and lateral runout of a wheel and tire assembly can cause roughness, vibration, wheel tramp, tire wear, and steering wheel tremor.
The extent of the runout is measured with a radial runout gauge. All measurements are made on the vehicle with the tires inflated to recommended inflation pressures.
Tire Runout
Measure radial and lateral runout at the positions shown in the illustration. Runout should not exceed specifications.
Wheel Runout
Measure radial and lateral wheel runout at the positions shown on the illustration. Runout should not exceed specifications. Note that the tire has been removed.