Patent ID: 7931553

Claim:
A bicycle sprocket apparatus comprising: a sprocket mounting member including: a hub mounting portion structured to be mounted to a rotating hub that rotates around a rotational axis; and a sprocket mounting portion extending from the hub mounting portion, wherein the sprocket mounting portion includes a first sprocket mounting surface that faces in a first direction and a second sprocket mounting surface that faces in an opposite second direction; a first sprocket disposed at the first sprocket mounting surface, wherein the first sprocket has a plurality of first chain-engaging teeth, and wherein the first sprocket is an axially endmost sprocket of the sprocket apparatus; a second sprocket disposed at the second sprocket mounting surface, wherein the second sprocket has a plurality of second chain-engaging teeth; a first fastener that fastens the first sprocket to the first sprocket mounting surface; and a chain supporting structure extending from the first fastener in the first direction and projecting in the first direction away from a side surface of the first sprocket that faces in the first direction; wherein the chain supporting structure has an axial width sufficient to catch the chain to prevent the chain from falling radially inwardly from the chain supporting structure.