We are lifting our 2004 Dually and am haveing troubles with tire size selection. I want to run a 36"- 37" tall tire but all these seem to be in a 12.5" width. I have seen a few pics of duallies with the 12.5" wide tire on aftermarket 6" wide rims,it looks like they really bulge in to fit on the tire. They must be running a spacer as well, is this cool ? Does any one know of a 11" wide tire in the 36"-37" range. Or does anyone have any experience running a 12.5" wide tire in the dually set up? Any help / pictures would be appreciated.