Wheel Runout Measurement

Obtain the following measurements:




- Lateral runout




- Radial runout
If you are unable to bring runout within tolerance by match-mounting, dismount the tire from the wheel and obtain the following measurements:




- Radial runout




- Lateral runout

You can measure rim runout more accurately on the inside band area of the wheel. Measure wheel runout using the same procedure as tire runout. Ignore any jumps or dips due to paint drips, chips, or welds.




Measure both the inboard flange and outboard flange as shown. The tolerances for wheel runout are as follows:
If the runout of the wheel is beyond the tolerance, replace the wheel.

Important: Always measure the runout of new wheels. DO NOT assume that a new wheel is automatically good.

When replacing a wheel, refer to the wheel code that is stamped next to the valve stem. Cross-reference the letter code with the parts book.
If the runout of the wheel is within tolerance, and the tire/wheel assembly runout cannot be reduced to an acceptable level by using the match-mounting technique, replace the tire.

Important: Always remeasure the tire/wheel assembly runout after you replace the tire.

If you notice a large difference in runout measurements between on-vehicle testing and off-vehicle testing, the runout problem is due to one of the following:
- Stud circle runout
- Hub flange runout
- A mounting problem between the wheel and the vehicle
The listed tolerances should serve only as a guideline. If runout measurements are within tolerance but are marginal, some sensitive vehicles may still be affected. Always reduce runout to as little as possible in order to attain optimum results under all conditions.