What are you asking? You can run up to a 245/70/19.5 with out anylift. You may be able to get a 256/70/19.5 with sometriming. I've got 225/70/19.5 on my 2500 and the fit like a stock tire. You'll run in to fitment issues on the plastic wheel liner with a 265. How big do you want to go?