Originally Posted by
KC8QVO
The Bikes At Work side mount/axle hitch looks pretty promising. This one uses the same plain rod end ball joint I was referring to. From the pictures on the site it appears to use a lock nut and is mounted in a round tube. My assumption is if the trailer rolled beyond a certain angle the ball joint frame (the threaded part and lollipop head) would rotate inside the tube. That would certainly overcome the roll issue with the give in how the ball joint is attached.
https://www.bikesatwork.com/store/pr...-trailer-hitch
This is a hitch I made years ago. It's a bit crude but works OK, never had any problems. The part that goes on the bike was modified after the first ride to keep it aligned.
I used wheelchair hubs, 12mm axles and ball bearings are enough up to 50-60 kilos IMO.