I had just over 200 miles on my bike and i noticed that the rear brakes were shot... totally gone! I was lucky I checked them when I did, one more ride, and I would have ruined my rotor! I switched to the sintered pads and with only 100 miles on them, they seem to be wearing ok, nothing spectacular. I havent changed the bearings yet, but while I had it apart greasing them, I noticed the spacer on the sprocket side is grooved. I may try erider or enduro engineering's complete kits for replacements. I have been extremely happy with both companys.