O.K. this happened to a close friend of ours, actually you can't say it happened to him cuz he pretty much did it to himself. Anyways our buddy's workin in his shop and realizes two days before a big dune trip that the new rear rims he odered are two different widths. So being the long time machinest that he is he quickly takes the larger one off the bike, puts it on the lathe and sections out an inch from the middle then neatly welds it back together. It was just as he was putting it back on the bike when he glanced over at his sons bike and noticed he had two different size wheels as well.