Distortion Checks

Distortion checks
Check for distortion by raising the vehicle so that the wheels are free and placing an axle stand or similar fixed object next to each wheel in turn.
If the stand is placed at the tread of the tire, the tire can be checked for ovality by turning the wheel by hand and checking for high or low spots where the gap between the tread and the stand increases or reduces.
If the stand is placed next to the wheel rim or tire sidewall, the wheel and tire can be checked for run-out in a similar way.