Front brake disc runout check

Place a dial gauge about 10 mm (0.4 in.) from the outer circumference of the brake disc, and measure the runout of the disc.
Brake disc runout

Limit : 0.050 mm (0.0016 in.) or less (new one)

Courtesy of KIA MOTORS AMERICA, INC.
if the measured disc runout larger than the limit and thickness thicker than the service limit of the disc, skim the brake disc and measure the runout again.
NOTE:
- Skim the disc according to the method of using each skimming lathe. (On-car mounting or external device)
- Do not skim the brake disc when it reaches the service limit.
If the runout of the brake disc still exceeds the limit specification, replace the disc, and then measure the runout again.