Ritchey Zeta Freehub Body Description: Authentic replacement freehub body for Ritchey Zeta wheels using the high-quality precision manufacturing process Ritchey is known for. Features: Star Ratchet Campagnolo N3W freehub body for 13-speed campy cassette, also backward compatible with 11 & 12 speed Campagnolo cassettes Two stainless steel bearings distribute load for increased bearing life OEM replacement part on the following wheels: WCS Zeta (Rim and Disc Brake) WCS Zeta GX Zeta Classic (Rim Brake Only)