The two that I have I am using on a go kart project. They are from a 1960s chopper mini bike. I would rather have these wheels in a 5 inch on the go kart I am redoing I think it would look a lot nicer. And would look more correct. The kart is a (1980s I think) Robron rocket.
Now I'll have to shop around on Facebook or letgo places like that. More than likely I'll have to get a hole mini bike or kart to get these wheels.