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. Larger disc brake rotor option provides consistent brake performance with more power. For use with resin or metal pads. Includes rotor fixing bolts and non-turn washers. Easy to install anti-loosen plates help secure disc brake rotor bolts in place. Item Specifications: Hub/Disc Compatibility, 6-Bolt Disc, Pad Compatibility, All Pad Compounds, Rotor Size (mm), 220, Rotor Type, One Piece,.