There have been a ton of great posts here and I keep thinking I need to try something, anything...I bought a Maisto U haul trailer (about 1 inch wide and 2 inches long) that had dual HO size wheels. I pulled it behind an off the shelf lighted NASA streets van and the plastic tires kept falling into the cracks where you enter the wide transition curves of streets roadway.
I found a set of tires and wheels in the parts box and went to work. The results are in the video. It bumps along at different places, but I decided I liked a little action.
Thanks for the inspiration, ideas, and posts on the Forum! Terry