* Shimano 11 speed freehub body for all Campagnolo hubs and wheels with oversized axles (17mm, fits most 2013+ wheels)* Made from steel* Compatible with the following Campagnolo hubs/wheels: Record hubs, Shamal Ultra (Cl and 2-Way), Eurus (Cl and 2-Way), Zonda (Cl and 2-Way), Hyperon, Hyperon Ultra Two, Neutron, Neutron Ultra, Bora One, Bora Ultra Two* Also compatible with Fulcrum Racing Zero, Racing 1 and Racing 3 (Fulcrum part # RS-113)