DT Swiss Ratchet EXP Freehub Body - SRAM XDR Standard Aluminum Ceramic Bearing Kit w/ End Cap 12 x 142 mmDT Swiss Ratchet EXP Freehub Body SRAM XDR Standard Aluminum Ceramic Bearing Kit w End Cap 12 x 142 mm. Ratchet EXP freehub bodies have a matte finish. These are available in two different versions with ceramic bearings for the 180 hub and with steel bearings for the 240. Ratchet EXP freehub bodies have no seal themselves as this sits on the hub shell. TECH SPECS Cassette Body Type SRAM XDR Cassette Body Type SRAM XD 11 12 Speed Material Aluminum Rear