The Shimano GRX BR-RX820 2-piston disc brake caliper brings a high level of control to gravel cycling with enhanced modulation and a quick initial braking point. Despite its smaller construction, the system is exceptionally quiet and easy to maintain 2-piston caliper features 10% wider pad clearance to decrease brake noise One-way maintenance-friendly bleeding process for quick and easy prevention of air bubbles in the hydraulic system Includes finned L05A pads with a resin compound for enhanced heat dissipation Front includes bracket for 140/160 rotors (assembled for 160mm) Disc brake rotor sold separately Rotor Included: No Pad Compound: Resin Hydraulic Fluid Type: Mineral Oil Brake Lever Actuation: Hydraulic Brake Caliper Type: Flat Mount Recommended Brake Lever: ST-RX820 ST-RX820-LA BL-RX820-L Recommended Brake Rotor: RT-CL800 Weight: 146g. (front); 136g. (rear) Color: Black