Bike trailer hitch

thingiverse

Attach a trailer to your bicycle using a 32mm inner diameter radiator hose for flexibility around corners. You'll need a connector suitable for your bike to join the hose, which can simply slide on and off, secured with a pin through both pieces and a padlock for added security against theft. The bolts (A2 stainless steel M6x20) screw into A2 stainless steel domed nuts, but remove any excess support structure and sand down for a smooth finish. This setup is a work-in-progress, similar to a previous steel hitch that lasted years; however, the durability of this plastic version made from PLA remains to be seen.