986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post

PaulE · 10-14-2015, 06:57 AM

Flouese, if you look at your rotors, you will likely see a very thin rusty edge at the very outside face of the rotor. The disk brake pads don't come in contact all the way to the very outside edge of the rotor, their contact ends where the shiny part of the rotor ends. The shiny part of the rotor is worn down and made thinner by the brake pads over time. The outer edge is the original thickness of the rotor and rusts due to not being contacted by the brake pad. So if that lip edge is very pronounced, it means the rotor has been worn too thin and needs to be replaced when a brake job is done.

10-14-2015, 06:57 AM	#7
PaulE Registered User Join Date: Jan 2014 Location: New Jersey Posts: 1,631	Lip Flouese, if you look at your rotors, you will likely see a very thin rusty edge at the very outside face of the rotor. The disk brake pads don't come in contact all the way to the very outside edge of the rotor, their contact ends where the shiny part of the rotor ends. The shiny part of the rotor is worn down and made thinner by the brake pads over time. The outer edge is the original thickness of the rotor and rusts due to not being contacted by the brake pad. So if that lip edge is very pronounced, it means the rotor has been worn too thin and needs to be replaced when a brake job is done.