Replacement CULT ceramic bearing kit for Bora and Hyperon Wheels Can be used to upgrade any Campagnolo wheel with cup-and-cone bearings and oversized axles (17mm) Also fits certain Fulcrum wheels – same as Fulcrum part RS-200 Includes everything required for one wheel: 2 bearings and retainers, 2 cups, 2 cones and 2 seals