Bicycle chain wheel, has fastener cover structure overlying on external section of fastener for hiding fastener during examining external surface side of chain ring mounting structure, where fastener is coupled at ring mounting opening

摘要

The wheel (12) has fastener covers and a chain ring mounting structure comprising an external surface side and an internal surface side with a chain ring mounting opening at the external surface side. A chain ring overlies on one of the external surface side and the internal surface side. A fastener is coupled at the chain ring mounting opening for fixing the chain ring at the chain ring mounting structure. A fastener cover structure (14) overlies on an external section of the fastener for hiding the fastener during examining the external surface side of the chain ring mounting structure.