DT Swiss Ratchet Freehub Body - SRAM XDR Standard Aluminum Sealed Bearing Kit w/ End Cap 12 x 142 mmDT Swiss Ratchet Freehub Body SRAM XDR Standard Aluminum Sealed Bearing Kit w End Cap 12 x 142 mm. Ratchet freehub bodies have a gloss finish and dont have a seal as this is fixed on the hub shell. The Ratchet System was the first of this type for DT Swiss; used in the mid range products like the 350 hubs. TECH SPECS Cassette Body Type SRAM XDR Cassette Body Type SRAM XD 11 12 Speed Material Aluminum Rear Axle Type 12mm Thru axle Rear Hub Spacing (mm)