Bush for bicycle headset, has self lubricating layer made of specific material provided at peripheral side of ring

摘要

The bush (4) includes a ring assembly consisting of an inner ring (1), an outer ring (2) and a buckling ring (3). A self lubricating layer (5) made of macromolecule material such as polytetrafluoroethane is provided at one side among the outer or inner peripheral sides of the ring.