Ratchet freehub bodies have a gloss finish and don't 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. End Cap Included SPECS : Rear Hub Spacing (mm): 142 / 148 Material: Aluminum Cassette Body Type: SRAM XD 11/12 Speed Rear Axle Type: 12mm Thru-axle