XD Driver/Freehub for SRAM XX1 11-speed 10-42 cassette. This one works on existing Stan's 3.30 QR rear hubs. Includes: XD Freehub, spacer, drive side end cap, 3 6802 chrome steel bearings.
The XD Drivers will come with a drive side end cap that is specific to the type of axle you are using. It will ONLY come with the drive side end cap.