I know that other sub-models with 32" tires have the same standard suspension as the Base. The Badlands which comes with 33" tires has a different suspension. I suspect that 33" tires will rub slightly on a Base (or other models with standard suspension) at full articulation and/or wheel turn, so you'll probably need a small lift from the aftermarket, maybe 1 or 2 inches, but we may not know for sure until someone tries it. The width of the tire (and the width of the rim you put it on) could also affect also whether a 33" tire will fit or not.