Checking Brake Discs For Edge Damage

Information 

• Irrespective of wear, a brake disc change may be necessary due to edge damage on the brake disc friction surfaces. 
• In such cases, only one brake disc may need to be replaced if the friction surface of the other PCCB brake disc is still perfectly OK. 

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Edge damage on PCCB brake disc

• Max. permissible width/depth = 2 mm
• Max. permitted length = 10 mm
• Max. 3 damaged edge areas permissible