As more than one person has already asked me about my rear wheel by PM, i'll post a write up, just in case somebody else is interested. That's my bike. It's an old pic by the way. Now it has a few more mods done. Whell, about the rear wheel, it's a Suzuki GS500 wheel. It's pretty compatible with the XR but it needs some machine work to make it perfectly fit. The chain sprocket is compatible with the XR type of chain so no mods needed there. THe brake rotor must be cut as its larger in diameter and also be machined as it's thicker than the XR one. The lenght between the chain sprocket<->center of the wheel and brake rotor<->center of the wheel must be reduced to be compatible with the stock XR one. Here go some pics. Hope you'll understand it. I had to ask the machine shop to make all the modifications you'll see on the pics. About the rear tire, yes i did a mistake buying it. My next tire will be a real street one. If you need more info feel free to ask.