Checking Front Brake Disc (Minimum Thickness)

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Information

Normally, brake discs are used until the maximum wear dimension is reached.

As the press-on force of the brake piston on the brake pad varies in magnitude, different areas of wear occur on the friction surface.

There are basically two different wear areas on the brake disc:

-LHD vehicle - Outer and inner wear area.

-RHD vehicle - Central wear area.

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Wear areas A and B

The central wear area -RHD vehicle - is the area with the highest degree of wear.

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Wear area B

Measure the brake discs with a suitable micrometer at a minimum of three different places (-A, B, C- ), offset by 120°.

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Measuring points for brake disc thickness