I will be getting rid of the rims eventually. The thing with these bikes is the crush drive (compensator) on the rear hub ... it makes life a little more challenging, to say the least. If someone came out with a 16" rim for the rear that works with the stock belt drive (StoneFree?>

) I would buy it up, but for right now the easiest way to get around that is getting rid of the belt all together and going with a chain. 1WheelRevolution is working on a chain drive that will work with the stock rims and I'm hoping to get the front sprocket off of them and then going with some rims off of a Sporty, put a chain sprocket on it and space the wheel accordingly.
I'm playing the waiting game right now though, see who can get me the parts first, before I go ahead with the mod.