High performance low profile 105 hydraulic road disc brake for efficient braking in all conditions. With proven hydraulic braking technology, the new Shimano 105 calipers feature the Shimano Flat Mount System and its low-profile design that is ideal for road bikes. More compact and lighter than ever, the R7170 brakes offer wide pad clearance for easy wheel removal and quiet performance as well as one-way bleeding for easy, clean maintenance. Features: Front option is for use for flat mount forks with adapter to flip between 140 and 160 mm Rear wheel use for 140 mm flat mount frames, can be used with adapter for 160 mm Oversized 22mm ceramic pistons optimized for heat insulation, lightweight and stiffness Opposed 2-piston design reduces leading effect and optimal pad wear increases braking control Increased pad to rotor clearance reduces the chance of rotor drag Forged calliper design is lightweight and rigid One way internal fluid circuit makes bleeding easy Mineral oil brake fluid is non-corrosive and less hazardous than conventional hydraulic brake fluid Shim-less mounting bracket allows for quick installation and setting up Recommended for use with Ice Tech Center Lock SM-RT70 rotors for optimum braking performance Comes complete with L05A resin compound pads Inline hose routing for low profile design Technical: Brake Hose Kit: SM-BH90-J-SSR SM-BH90-JK-SSR Hose Join: Straight Additional Pad Options you can purchase: - K05S-RX Resin (w/o fin) - L05A-RF Resin (w/ fin) - L04C-MF Metal (w/ fin)