Shimano Ultegra Rear Back Brake BR-6600 Caliper 6600
-Super SLR dual pivot design with thrust bearing
-Forged aluminum arms (Includes sunken bolt/nut)
-Convex washer, brake pad angle system and spring tension adjustment
-Resin bumper tire guide protects rim when shoes wear down
-Includes Q/R, barrel adjuster, and R55C2 cartridge brake pads
1- Rear brake caliper (as shown) included in this listing.