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Home >> Porsche >> 2021 >> 911 Targa 4 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 61 (46 Brakes - Brake Mechanism 3.8L (Eng Code MDK.H) -- 992 - 911 CARRERA (992)) >> WM, 465004 Measuring Front Brake Disc >> Information >> Wear Areas On Brake Disc Friction Surface

Wear Areas On Brake Disc Friction Surface

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As the pressure force of a brake piston on the brake pad varies in magnitude, different areas of wear arise on the friction surface.

The brake disc can basically be divided into the inner/outer and central wear area:

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

G15526439Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Measurement points on brake disc

Inner/outer wear area
Central wear area