In-Hand

Measuring Brake Pad Lining Thickness:

Inspect the brake linings any time the wheels are removed (tire rotation, etc.). Check both ends of the outer pad by looking at each end of the caliper. These are the points at which the highest rate of wear normally occurs. At the same time, check the lining thickness on the inner shoe to make sure that it was no worn prematurely. Some inboard shoes and linings have a thermal layer against the shoe, integrally molded with the lining. This extra layer should not be confused with uneven inboard-outboard lining wear. Look down through the inspection hole in the top of the caliper to view the inner shoe. When ever the thickness of any lining is worn to within 1mm (0.039 in) of the shoe, all disc brake pad and lining assemblies should be replaced at the same time. The disc pads have a wear indicator that makes a noise when the pad wear to a degree where replacement is required.

Specs:
Service Limit 1mm (0.039 in)