All around improved, the Shimano Ultegra BR-R8170 caliper offers optimised dosing, quieter braking performance and extremely simplified maintenance.
While a faster-gripping initial braking force always gives the feeling of full control, the 10 % increase in brake pad spacing allows for a significant reduction in noise during braking, despite a flatter overall construction. In addition, when the RT-MT900 brake disc rotor (sold separately) is used, its deformation-resistant design, even with increasing heat, helps to create an extremely quiet and smooth braking system.
To simplify maintenance, the hydraulic 2-piston brake caliper not only features the proven One-Way-Bleeding system, but also a separate arrangement of bleed nipple and opening screw. On the one hand, this minimises the risk of the bleed kit hose slipping off when opening or closing the system and, on the other hand, makes it unnecessary to dismantle the caliper from the frame for bleeding process.
Specifications
brake caliper: aluminium (painted)
pistons: resin
Compatibility:
STI lever: ST-R9270, ST-R8170
sub brake lever: BL-RX812
brake disc: RT-MT800
brake pad: K03S Resin, L03A Resin, L04C Metal
brake hose: SM-BH90-J-SSR, SM-BH90-JK-SSR
Brake caliper includes L03A Resin Ice-Tech brake pads (without disc rotor and brake hose).
Front: incl. adapter (160mm disc)
Rear: incl. fixing bolt (25 mm mount thickness)
Mfr Claimed Weight
146g (front)
136g (rear)
