Replacement XD Driver for DT Swiss hubs using a 3-pawl design. FEATURES: XD drivers for repair or replacement DT 12 x 142mm and 12 x 148mm rear hubs use the same end caps Also used for 12 x 157mm spacing End caps do not convert non-Boost hubs to Boost 148mm spacing. DT 142x12mm and 148x12mm hubs simply share the same end caps SPECS: Material: Aluminum Cassette Body Type: SRAM XD 11/12 Speed