Tools Required

J 26900-1 Outside Micrometer

Use a J 26900-1 in order to measure the thickness of the rotor (1). Make the measurements at four or more points around the rotor's circumference. Make all measurements at the same distance in from the edge of the rotor.

The maximum rotor thickness variation is 0.1 mm (0.0039 in). A rotor that varies more than specifications can cause pedal pulsation and/or front end vibration during brake applications. Replace or refinish to specifications any rotor that varies more than specifications. Refer to Brake Rotor Replacement .