Excellent braking performance thanks to their stainless steel and alloy 3 layer design, the Shimano XT RT81 Disc Brakes manage heat while riding to ensure you don't suffer from brake fade, even on the longest descents. With the unique alloy sandwich, the outer surface of the disc brakes are reduced by around 50°C and when used in combination with Ice-Tec pads, the SM-RT91 Rotors are even