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 rotorsLight weight heat resistant design for less fade less noise and longer pad lifeMud shedding rotor blade design helps to keep the rotor cleaanerIncludes rotor fixing bolts and non-turn washers