Clark`s newest hydraulic brake has all the features and capability of much higher end brake in the market but a price point that is designed to focus on entry level bikes Clark`s newest hydraulic brake has all the features and capability of much higher end brake in the market but a price point that is designed to focus on entry level bikes The M1 is a mineral oil brake that features a 2 piston caliper, and small well designed lever assembly with reach adjustment Includes brake set and rotor(s)