Shimano xtsaint rt86 ice tech 6 bolt disc rotorshimanos xtsaint rt86 ice tech 6 bolt disc rotor provides excellent stopping performance in all conditions featuring a three layer sandwich construction of stainless steel and alloy 3 layer to rapidly radiate the heat generated whilst riding this shimano xtsaint rt86 ice tech 6 bolt disc rotor has an excellent shelf life and generates less noise than a conventional disc rotor featuresmaterial stainless steel and alloydisc rotor mount 6 bolt