Description Robert Axle Project’s Trailer Hitch Adapter ADA005 – M12 x 1.25 is designed specifically to fit your Rad Power bike or Mahle/EBIKEMOTION Equipped E-Bikes and allow attachment of any hitch-mounted trailer. The adapter threads on to your M12 axle with a 1.25 thread pitch. Why Robert Axle’s Trailer Hitch Adapter ADA005 – M12 x 1.25? 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.