Caliper Type: hydraulic, 2-piston Mount Type: flat Fluid: SHIMANO mineral oil Compatibility: ST R7170 lever Includes: caliper, pads, mounting hardware From building up a new road bike to replacing parts after a crash, the low-profile Shimano 105 BR-R7170 Flat Mount Disc Brake Caliper delivers exceptional braking performance without breaking the bank. Built from lightweight materials with increased pad clearance, this 2-piston hydraulic caliper nearly eliminates rotor noise and makes brake maintenance a fuss-free endeavor.