DT Swiss Ratchet EXP Ceramic Freehub For Sram XD. Genuine DT Swiss replacement Freehub body. For Sram XDR Road drivetrains. Rear Hub Spacing: 142X12. Bearings: Premium custom made SiNC ceramic bearings. Body Material: Aluminium. Tool free install. Fits Fits Ratchet system hubs as found on DT complete wheels and ratchet 350 hubs, will not fit 3-Pawl hubs.