Shimano Deore XT SM-RT86 6-Bolt Disc Rotors feature ICE cooling technology and a mud shredding rotor blade design to keep the rotor cooler and cleaner. - ICE technology features a 3-layer structure with an aluminum core and two stainless steel outer layers to reduce rotor surface temperature by approximately 100 degrees Celsius compared to all-steel rotors - Lightweight, heat-resistant design for less fade, less noise, and longer pad life - Mud shedding rotor blade design helps to keep the rotor cleaner - Includes rotor fixing bolts and non-turn washers