The Shimano Deore SM-RT54 disc brake rotors provide exceptional stopping power in all riding conditions. Shimano's Center Lock mounting system makes installing and removing rotors quick and easy thanks to the spine mount and lock ring design.Includes external type rotor lockringCompatible with all axlesFor use with resin pads onlyCenter Lock lockring design offers fast and easy installationItem SpecificationsRotor Size (mm)180Hub/Disc CompatibilityCenter-Lock DiscPad CompatibilityResin Pads OnlyRotor TypeTwo Piece