
These are of the inner surface.










As you can see the inner surface looks a bid odd?

The outer surface is fine, nice and smooth and no ridge running on the outside.


I noticed the brake pad looks like a wedge of cheese!

Is it normal to have a ridge on the outside? It chips off so it's level with the disc.


I am guessing because of the uneven wear one of the pistons is sticking but why the ridge?!