Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.
I used these guys and kept my wheels and tires the stock size. I think you can only get the gloss black. As soon as I got them dirty it did not matter much.
http://www.4wheelcustoms.com/Products.asp?Cat=36
http://www.steelsoldiers.com/showthread.php?81172-M1008-Wheel-Tire-upgrade&highlight=