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 SRAM XDR road compatible XDR driver bodies are compatible with all XD cassettes when the cassette is installed with a 1.85mm spacer (sold separately) 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)