Shimano Deore XT SM-RT86 6-Bolt Disc Rotors features 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 aluminum core and two stainless steel outer layers to reduce rotor surface temperature approximately 100 degrees Celsius compared to all-steel rotors. Light weight, 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.