Dt swiss freehub kit sram xx1 pawlratchet system dt typical spur gear teeth freewheel 11 speed cassette to be converted with the conversion kit from the conventional system for 910x drives on the sram all three adapter solutions are selected that make the hubs with 135mm qr axle 135x10mm thru bolt or 135x12142x12mm thru axle with the group sram xx1 compatible featuresfreewheel body material aluminumaxis system quick release 5mm 10mm thru bolt 135x12mm thru axle or 142x12mmdt swiss