Formula Centerlock RotorDesigned specifically to replace the rotors for Formula's exceptional brakes, these Centerlock Rotors get the job done-and they do it well. With excellent heat distribution, and a two-piece aluminum frame, these rotors embody everything you look for in a brake. They feature the standard Shimano 35mm Centerlock spline system, and come in varying sizes.FeaturesCompatibility Formula Brakes, Shimano Centerlock style 35mm splined hubsSizes 160, 180, 203mmWeight 123g (180mm)