This page:

Looking For Corrosion And Wear On Your Brake Pads And Discs.
![]() | Check how much meat you have on the outer brake pad.... |
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![]() | ....and the inner pad, minimum thickness is 1.5mm |
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![]() | Check if there's an outside lip developing on the front face of the brake disc (this disc has), pitting.... |
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![]() | ...and build up of corrosion/rust on the back. |
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![]() | On the edge of a new brake disc there should be the minimum thickness stamped, this one is 20.2mm |