Shimano SLX SM-RT66 6-bolt disc brake rotors deliver consistent stopping power in all riding conditions. The disc brake rotor&';s reliable anti-loosen plate construction makes for quick and secure installation. For use with resin or metal pads Includes rotor fixing bolts and non-turn washers If your new rotors are a different size than the ones you&';re replacing, then you&';ll need new brake adapters! Check out our guide to getting the right brake adapters to spend less time on the computer and more on the trails.