Had about 9000 when the fronts, although still very good, were replaced with a warped rotor. I replaced the backs just for grins to keep the time/mile same for the set (front/back). The ones that came off the back were fine, better than the fronts. Probably could have gone another 5k or more, but I replaced them anyway. Kind of weird, so many people getting such a varied number of miles from the stock brake pads.