US Patent 9415835 Rotatable annular bicycle component and bicycle rear sprocket

A rotatable annular bicycle component comprises an outer annular member, an intermediate supporting member, and a hub engaging member. The outer annular member comprises a first material. The outer annular member is attached to the intermediate supporting member. The intermediate supporting member comprises a second material different from the first material. The hub engaging member is configured to be attached to the intermediate supporting member and is configured to engage with a bicycle hub assembly. The hub engaging member comprises a third material different from the second material.