Description The Robert Axle Trailer Hitch Adapter ADA007 – 3/8-26 will allow you to attach a kid trailer or cargo trailer to your 3/8″ axle with a 26 TPI. The adapter threads on to your 3/8″ axle with a 26 thread pitch. Common hubs with this axle are; Shimano Nexus, Shimano Alfine, Shimano Coasting. Why Robert Axle’s Trailer Hitch Adapter ADA007 – 3/8-26? Robert Axle’s hitch adapter for towing kid trailers, dog trailers, and single-arm bike trailers is high quality and precisely machined. Working with all the two-wheeled child, pet and cargo trailers such as: Thule, Chariot, Burley, Instep, Carry Freedom, and many more. This hitch adapter is made of stainless steel and is incredibly durable. It’s built to handle towing a fully loaded bike trailer. It easily clears hooded dropouts and other interfering dropouts. It is easy to install. Simply replace the existing non-drive side nut with this adapter, and attach the hitch that came with your trailer. This hitch adapter uses a 17 mm wrench to attach your hitch more securely than with other knurled adapters. When installing the hitch, the 5 mm wrench isolates and protects dropouts from marring and over-tightening. Our friends at Robert Axle Project believe in enhancing the role of bikes in your life’s adventures. Expanding their immensely thorough catalogue of thru axles for trailers, racks, trainers, and more, helps them do that.