I would imagine you would need a 35" tire thats less than 10.5" wide to go without spacers in the rear. Not sure who would make that though, Interco maybe?
35x12.5x17 MTZ's fit on my truck but they rubbed the control arms at 95% turn lock .... I opted for the 33x12.5x17 MTZ's due to my trailer and going to 33x10.5x17 BFG's this year for wear reasons .... :Cheer:
i have a friend with 285s on a mega cab dually he tows alot and said that he has to keep them aired up good or they will rub but he likes them and they look pretty wicked!! but tire dealers claim a 255 is the biggest you can go!