Shimano Dura-Ace BR-R9270-F Hydraulic Disc Brake Caliper - Front Flat Mount Resin Brake PadsShimano Dura Ace BR R9270 F Hydraulic Disc Brake Caliper Front Flat Mount Resin Brake Pads. With an all new mono body construction design high performance braking has reached a new peak. The Dura Ace BR R9270 caliper drops weight while also providing increased pad clearance ensuring a quieter ride. Lastly a new bleeding process makes maintenance easier than ever. One piece structure maximizes stiffness and reduces weight 10% wider pad clearance