Patent ID: 7448297

Claim:
A mountable bicycle structure comprising: a component support portion; a tubular clamping portion coupled to the component support portion, the tubular clamping portion having a split ring configuration with an attachment slot, a first end section, a second end section and a curved inner surface extending between the first and second end sections to define an adjustable inner diameter with a center axis; a tightening structure coupled to the first and second end sections of the tubular clamping portion to selectively reduce the adjustable inner diameter of the tubular clamping portion; and an adapter member having a split ring configuration with an outer surface removably arranged on the curved inner surface of the tubular clamping portion to effectively reduce the adjustable inner diameter when the adapter member is arranged on the curved inner surface of the tubular clamping portion, the adapter member having a pair of free ends with a split therebetween and a curved interior surface extending between the free ends, the tubular clamping portion having at least one projection non-movably fixed thereto that extends radially inwardly from the curved inner surface toward the center axis such that the projection contacts one of the free ends of the adapter member when the adapter member is arranged on the curved inner surface of the tubular clamping portion to align the split of the adapter member with the attachment slot, the projection extending radially inwardly from the curved inner surface by a radial height smaller than a radial thickness of the adapter member measured between the curved inner surface of the tubular clamping portion and the curved interior surface of the adapter member such that the adapter member projects radially inwardly beyond the projection.