I think it should. I have a rear wheel from a '89 KDX200 that I use with a paddle tire for dune riding. I used it on my '92 KDX200, but I will throw it on my '97 KDX220 and let you know.
When does the auction end? I have my bike torn apart at my brother's shop and wont get to it until Saturday. (I have my spare wheel at home). I am going to take off my paddle and put a trials tire on as well. It would be really nice to just switch wheels for different riding conditions.
Did you get your extra wheel? what trials tire are you using. I am thinking of going with a Mitas on my extra wheel. The decision for me is to do the RB, FWW and trials tire (should get me up anything I point it at), or just do an autoclutch, cant afford both. Tough choices.