SHIMANO IBRRS811R83 Ultegra DM rear disc brake caliper

Shimano Under Bottom Bracket Mount Rear Brake Caliper SLR-EV Rim Brake. Features: - Exceptional balance of rigidity, weight and stopping power - Sleek and integrated low-profile caliper design - Need inline cable adjuster (SM-CB90) for cable adjusting and quick release feature. Specifications: - Type: Direct mount type - Reach (mm): 51 - Brake shoe Standard: R55C4 - Brake shoe Optional choice: R55C4 Carbon, R55C4-A Carbon, R55CT4 - Compatibility: SLR-EV - Cartridge shoe holder: Yes - Tire guide bumpers: Yes - Shoe angle adjusting: Yes - Spring tension adjusting: Yes - Maximum tire size: 28C - Rim width (mm): 20.8-28 Technology: SLR-EV: - SLR-EV is SLR with a dual symmetric pivot brake caliper. The short-arm brake design employs two bearings and a roller to realize greater efficiency in the pivot area and deliver superior modulation and power for braking. Together with the BC-9000 brake cable, the latest calipers deliver 36% more braking power than SHIMANO’s previous brake model. And we offer 2 axle symmetric brake caliper and fork mount and chain stay mount type.