Kit allows you to convert your Neo or Neo Ultimate hub. The thru-axle to QR kit includes two SealLock end caps and Stan&';s aluminum quick-release skewer. SealLock end caps feature a low-friction U-cup seal that snaps into place and stays secure even when your wheel is removed from your bike. The QR/thru-axle to bolt-on kit includes end caps, threaded axle, bolts and washers. Bolt-on axles are recommended to prevent slipping and wheel misalignment in frames with horizontal drop-outs. - Not compatible with Centerlock or Boost hubs