XIANQI Works with disc brake and full suspension Fits QR axles and solid axles up to 12mm 12mm Thru-Axles will require Burleys adapted Thru-Axle. This replacement axle has external threading to accommodate the installation of our axle mounted hitches. Sport Type: Cycling The Steel Hitch provides the critical connection from yourTrailer to your bicycle. The hitch installs easily on the rear skewer of your bike, and then stays attached it can be connected at any time. If youd like to swap it from bike to bike, pick up a couple spare hitches and install them on the extra bikes so the hitch doesnt need to be un-installed when swapping bikes. The Steel Hitch will fit most bikes out of the box, but if you have a breezer style dropout or another unusual setup, you may require an adapter. SizeAperture 12mm Package Included:1pcs*Bike Steel Hitch