Bicycle Trailer Hitch Coupler vs Robert Axle Project Kid Trailer Adapter

Buy the Robert Axle Project Kid Trailer Adapter if you tow with a Rad Power, Mahle or Bikemotion hub-motor e-bike. Its machined stainless steel body threads onto the motor axle for a precise, secure fit. The CrafTecker coupler is a generic steel-and-nylon strap unit that clamps to standard nutted or quick-release axles on ordinary bikes and e-bikes, but it will not work with disc brakes and is not built for hub-motor axles. Owners of the Robert Axle part report a solid, rattle-free mount; the generic coupler is the cheaper-feeling option with a wider but looser fit.

• Choose the CrafTecker coupler if you have a standard bike or e-bike with nutted or quick-release axles, no disc brakes, and want a simple bolt-on hitch arm.
• Choose the Robert Axle Project adapter if your e-bike has a Rad Power, Mahle or Bikemotion hub motor and you need a proper threaded mount for a child or cargo trailer.