RockyMounts DriveShaft Adapter 10810RockyMounts DriveShaft Adapter is a15mm/20mm thru-axle adapter that can handle both loads and the only one on the market to securely lock up your bike. Its wide mouth opening allows easy bike loading/unloading and comes with interchangeable shims that provide secure fit. The shims also allow conversion from 12mm to 15mm to 20mm thru axle and the adapter comes with lock and keys.186135000945