MT Drag Radials

Like beatnik said 255's will fit with the right backspacing on the rims but you should check, Just to make sure. I have 235's, for now and rolled the rear lips now I have all kinds of room and am going to get me some 255's. I think you can get off set hangers too. That gives you a little more room as the leaf spring is no longer the limiting facter. Then you run into the inner fender. The only way to go wider than that is with a spring relo kit and some wheel tubs.

Hope that healps you out some.