To the great delight of riders and mechanics, the new ULTEGRA BR-R8170 brake caliper offers improved modulation, a quieter braking system, and an extremely easy bleeding process. The ULTEGRA R8170 disc brake caliper provides road cyclists with a completely new sense of control thanks to its enhanced modulation and a quicker engaging initial brake force. Despite the flatter design, the system produces less brake noise than ever before and is easier to maintain.