A 33" tire isn't a problem. BUT, the width will do you in once in a turn. I had 235/85s on mine with the Calstinky lift and Rocky Road Body Lift and no troubles, moved to a 10.5" wide tire and had major rub while turning. Stepped back to a 265/70/16 (31x10.5) and have had very little issues. So I think a tire wider than 10" is going to be the major issue unless you do some major work to the floor board tin up front. The rest can be trimmed and shaped to conform to the space required pretty easily. Their is guy on the board in Russia that is running 33x12.5 but he had custom springs made I believe to get more height.