Rotor Minimum Thickness
Measure rotor thickness (1) at the center of the brake pad contact surface. Replace the rotor if it is worn below minimum thickness or if machining the rotor will cause its thickness to fall below specifications.
CAUTION:
Do not machine the rotor if it will cause the rotor to fall below minimum thickness.
On front rotors, Minimum thickness specifications (2) are cast on the rotor's unmachined surface on the inside of the rotor (1).
On rear rotors, Minimum thickness specifications (3) are cast into the rotor's unmachined surface on the outside of the rotor (1). This area also shows the maximum thickness specifications (2) for the hat section of the rotor.