This is an Industry Nine XD Driver Freehub Body. Features: Replacement and conversion freehub bodies Conversions are XD1 freehub body with bearings and spacer (no pawls and springs) Completes are XD1 complete freehub bodies (with pawls and springs) Freehub bodies fit all current Industry Nine Torch rear hubs Note: XD drivers are only compatible with XD cassettes, not XDR cassettes.