911 Carrera (997) F6-3.6L (2006)
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 two areas of wear: outer wear areas and the central wear area.
The natural balance between stronger and weaker braking ensures that in almost all cases the typical wear profile of a perforated (cross-drilled) brake
disc (friction plate) arises.
This means that the inner and outer smooth friction edge area is most worn.
Outer wear areas
Central wear area
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Measuring brake disc thickness
Information
Unlike smooth brake discs, on which the minimum thickness is measured in the middle of the disc, the minimum thickness of perforated (cross-drilled)
brake discs must always be measured on the inner and outer friction surface track that is most worn -arrows-.
Wear areas A and B
-A- Central wear area
-B- Outer and inner wear area