I'm renovating a folding bike with 20 inch wheels and want to replace the wheels.
Will BMX wheels fit ?
EDIT 22-Feb-2020: 10mm BMX wheels dropped straight in with no mods.
The BMX freewheel was threaded on, I just screwed it off and screwed on the shimano six-speed cluster from my old bike. It needed extra spacers on both sides of the rear axle beyond what came with the BMX wheels: I used the ones from my old wheels so I didn't have far to look.
The only thing that shows that they are not made-to-fit is, on the front wheel, the ends of the axles stick out half an inch or so beyond the wheel nuts. I suppose I will cut them off in time.
I get it that I will probably have to go single-speed and therefore also replace the crank and chain. Is there any other reason they are not compatible, like different dropouts or axle width... I also know that a 2-inch BMX tire will fit in this frame, I fitted one once.