We're not sure what's worse: the screeching howl of corroded, worn-out brake pads, or not being able to stop your bike. It's probably the stopping thing, now that we think about it. Either way, BikeSmart high-quality replacement cartridge and disc pads are an affordable way to put some fresh stopping power on your bike. Remember--the faster you can slow down, the faster you can go. FEATURES: Fits Hayes Mag, Nine, and MX1 brakes Semi-metallic compound provides ideal balance of power, longevity and quietness Grippy, long lasting pad material Includes retainer spring