Brake Rotor/Disc

Disc Brake Rotor Dimensions

Front

Max. Runout 0.102 mm (0.004 in.)
Max. Thickness Variation 0.013 mm (0.0005 in.)

Rear

Max. Runout 0.102 mm (0.004 in.)
Max. Thickness Variation 0.0254 mm (0.001 in)

ROTOR MINIMUM THICKNESS

Measure rotor thickness at the center of the brakeshoe contact surface. Replace the rotor if worn below minimum thickness, or if machining would reduce thickness below the allowable minimum.

Rotor minimum thickness is usually specified on the rotor hub. The specification is either stamped or cast into the hub surface.