Originally Posted by wired1
tire size will depend on wheel size. If you run a 9" wide wheel with 0 or a + offset you can fit 37's if you run a 10" wide will with a -offset 35's is all your going to get on and keep from rubbing. Running a wide wheel with a neg offset helps to make up for the look of no having a taller tire. this is a pic of my truck with 35's on 20x9 with 0mm offset wheels on a 4.5 icon.
I ran 35/12.50/20 Toyo Open Country MT's on 20x10 BMF SOTA's at stock height with minimal rubbing. Only when the truck was flexing and the wheel was turned a certain way would they rub. I'm now running them with a 2.5" Icon leveling kit and 3" blocks in the back. ZERO rubbing. I'm betting that with these same wheels and 37/13.50/20's in the same tire, I would have no rubbing issues with 4.5" of lift.
With that being said....wheels specs are the ultimate factor in what tires will fit and what tires won't. A 20x10 (or wider) with crazy negative offset is going to hurt your chances of fitting bigger tires with less lift. My wheels are -19mm offset (pretty sure) and they work well. I know a few guys pulling off 35's at stock height with -24mm offset 20x10's.....but they are REALLY pushing it.
Moral of the story.....get the right wheel, and you can pull 37's off.