Patent ID: 8439778

Claim:
An axial fixing and closure member arrangement on an axle of a chain guide in a lower pivot head of a bicycle rear derailleur, wherein the axle is held in a rotatable and axially non-displaceable manner relative to the lower pivot head; comprising a spring element received in an opening that extends transversely to the axle in the lower pivot head, and two spring arms that engage with a circumferential groove on the axle of the chain guide in order to axially secure the axle relative to the lower pivot head; and a closure member that is shaped and sized to close the opening; wherein the spring element and the closure member form an integrated insert element, which is mounted on the lower pivot head, the spring element securing the axle relative to the lower pivot head in its position in the direction of its longitudinal stretch, the closure member can be removably inserted into the opening.