High quality disc brake hubs to fit any modern road or mountain bike. Features: Sealed cartridge bearings Angled flanges provide optimum spoke geometry Axle end caps for alternate frame specs are included (except for Boost hubs) and can be swapped without tools Durable Double Time four pawl mechanism offers quick engagement Specifications: Holes: 32h Brake Compatibility: 6-Bolt Disc Freehub Body: Sram XD Note: Sram XD drivers are only compatible with XD cassettes, not XDR cassettes.