Patent ID: 7665584

Claim:
An apparatus for coupling a bicycle disc brake rotor to a bicycle wheel hub, wherein the apparatus comprises: a) an adapter adapted to be nonrotatably coupled to the bicycle wheel hub, wherein the adapter includes a main body having opposing first and second faces and a plurality of axially extending protruding portions that extend from the second face, wherein each of the protruding portions includes a step portion having an inner surface facing radially inwardly and an outer surface facing radially outwardly, wherein the outer surface has a groove defined therein, b) a bicycle disc brake rotor having a central opening and a plurality of radially arranged openings defined therein, wherein the axially extending protruding portions extend through the radially arranged openings in the disc brake rotor to nonrotatably couple the disc brake rotor to the adapter, wherein the disc brake rotor is positioned adjacent the second face of the main body of the adapter, c) a rotor retaining member, wherein a portion of the rotor retaining member is received in the grooves in the protruding portions, and d) a lock ring having a central opening and a rotation inhibiting structure on an inner surface thereof for preventing rotation of the lock ring relative to the disc brake rotor, wherein the inner surfaces of the step portions of the protruding portions cooperate to define a space, wherein the lock ring is sized to fit in the space such that an outer circumferential surface of the lock ring is positioned adjacent the inner surfaces of the step portions.