Instructables
Picture of Bike trailer hitch
close-up.JPG
 For the bike contest, I made a bike trailer hitch. It is 1/2 inch, and attaches to any bike. It can tow almost anything, if you have the trailer for it and the leg strength.
I made it in solidworks. The part that i made is in the second picture. It is a trailer hitch that is designed for a bike.

the kayak,bike, and trailer frame is from GrabCad.
hazzalandy7 months ago

I built something very similar to that, the issue I had with it was getting the rear axle nuts tight enough to adequately support the weight of the trailer. I solved the problem by extending the legs of the hitch to the pedal spindle and attaching u bolts around the rear forks. I lined the inside of it with innertube for extra strength.