Brake replacement

The rear brakes on my road bike have been acting up for a while. I suspected the brake pads were worn, but hadn't really taken the time to pull them apart and check them until yesterday. Turns out that they were less worn than I feared. I was worried I'd blasted all the way through the brake material into the metal substrate. Luckily, that hadn't happened yet, but you can see in the first picture below that it was very near at hand on the inboard pad. The big problem was that the retaining/return spring had broken. This forced the outboard pad into misalignment and allowed the grab tab on that pad to rub on the rotor. The wear on the rotor is visible, but it doesn't appear to be seriously grooved. I'll be keeping an eye on it to make sure it doesn't warp or rust out.


For comparison, here is the set I pulled from my parts bike to replace the pair shown above. The spring has much more spread to it, not to mention is still whole. The pads have a little wear, but I didn't have many miles on that bike before I got hit on it and destroyed the frame.


For reference, these are for an Avid BB7 road mechanical disc brake. The pads have something like 1,500-2000 miles on them, including this past winter's commuting.