ROCKYMOUNTS DROPTOP 10880 FORK MOUNT THRU AXLE LOCKING incl TRACK HDWRThe DropTop utilizes a TPU overmolded shim to allow for both 12mm and 15mm axles to fit without the need for switching shims out It is based upon the same clamshell design as the DriveShaft series, which allows for easy loading and adapts to minor differences in axle diameter or contouring Wide mouth opening to easily load your bike and a locking T Bolt that adjusts for a tighter hold so the thru axle cannot be removed when locked Anti Theft: TPU