Shimano Ultegra BR-6810-RS Rear Seat Stay Direct Mount Brake Caliper
The Ultegra BR-6810 is a dual pivot brake with Shimano Linear Response (SLR) technology for faster response and optimized power transfer. Thanks to the new polymer-coated BC-R680 brake cables, the BR-6810 also offers improved modulation and controllability. The brake has an arm length of 51mm and is delivered with R55C4 brake shoes that are only for aluminum rims. The direct-mount design is perfect for aero frames.