I have a set of Shimano M575 brakes fitted to my commuting bike.
I find that there is no way to get the pads to align so that they wear evenly. There is always a small triangle that doesn't contact the pad and which eventually stops the brakes working effectively.
I pull the pads out, sand this triangle flat and reassemble the brakes and get a few more weeks wear out of them.
Firstly, is this common to all discs?
Secondly, I find it annoying that I can never really get full life out of the pads. Typically they get replaced when they're really only about half worn through. The calipers themselves (even when freshly bled and refilled) never seem to be able to completely close when the pads are worn.
Maybe my disc is worn too much, but it seems OK, worn, but no excessively so. I know there are fancier levers out there with bite point adjust. Do they solve this problem?
I had wondered about replacing the levers with SLX for example, but it's not really worth it since the pads only cost about £5 a set anyway.