Wheels: Testing and Inspection

How to Measure Wheel Runout





To measure the wheel runout, it is necessary to use an accurate dial indicator. The tire may be on or off the wheel. The wheel should be installed to the wheel balancer of the like for proper measurement.
Take measurements of both lateral runout (1) and radial runout (2) at both inside and outside of the rim flange. With the dial indicator set in place securely, turn the wheel one full revolution slowly and record every reading of the indicator.
When the measured runout exceeds the specification and correction by the balancer adjustment is impossible, replace the wheel. If the reading is affected by welding, paint or scratch, it should be ignored.
Lateral runout limit
"a": 1.40 mm (0.055 inch)
Radial runout limit
"b": 1.14 mm (0.045 inch)