Even with a 3.5-4" lift, most tires that size will require a little trimming, and that's just for regular daily driving. Especially if it's an aggressive tires, like the BFG Mud Terrains that come on some JK's. I have JK wheels with 265/70/17 Goodyear Duratracs, which are pretty aggressive, but a little less aggressive than BFG Mud's and a little smaller, too, and without trimming, they bite the **** of the lower inside lip of the front bumper. I'm an 3.5"+ lift. A less aggressive tire will usually be more forgiving, but on the other hand, all makes of tire vary in size. A 255/75/17 from one brand might only be 31.8" and another brand could be as much as 32.5". So that depends as well.
Regardless, you need a lift to run that size, and will most likely need some trimming. You would need full on fender trimming to fit them on a stock vehicle, and even if you trimmed as much as possible, you would still rub when the suspension flexed (unless you got bump stop extensions that limited up-travel to maybe an inch lol).