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 Specifications - Rear Hub Spacing (mm): 142 - Material: Aluminum - Cassette Body Type: SRAM XD 11/12 Speed - Rear Axle Type: 12mm Thru-axle