Forged aluminum, Super SLR dual-pivot arm design with an enhanced arch proportion and thrust bearing for faster response (not recommended for use with older Ultegra-6600 STI systems)
Convex washer, brake pad angle system for toe-in alignment and spring tension adjustment allowing for equalized lever pressure
Resin bumper tire guide protects rim when shoes wear down
Includes Q/R, barrel adjuster, front/rear sunken nuts and R55C3 cartridge pads
Features:
New super SLR design : Enhanced brake arch pivot location for quick linear response
Low profile outer cable stop : Improves cable routing for reduced friction especially with sloping frame
New brake shoe compound : 100% more stopping power in wet conditions.
Spring tension adjuster : Allows customized spring tension for equalized lever pressure
More ergonomic brake system : Better controllability