Cycling parents, this thru axle adapter is exactly what you need to attach your bike trailer to your modern bicycle! If you've got a bike with a 12mm thru axle system (which most newer bikes use), this adapter replaces your original axle so you can hook up trailers from brands like Thule, Burley, Schwinn, Allen Sports, and many others. The key is measuring your current axle properly - check the shaft length (should be between 167-185mm) and thread pitch (1.0, 1.5, or 1.75). This adapter comes with spacers so you can adjust the length to fit your specific bike setup. Installation is straightforward with a standard 5mm hex wrench - just remove your original axle, slide this one through with any necessary spacers, and you're ready to attach your trailer. No more struggling to find compatible accessories for your modern bike! The quality construction ensures your trailer stays securely attached while you're riding with your kids or cargo. Remember, the trailer hitch itself isn't included - this is specifically the axle adapter you need to make your existing trailer work with your thru axle bike. It's one of those simple solutions that makes family biking so much more accessible!