I have a buddy that just bought a new Chevy that has 245 75 16 tires on that he just took off for bigger meats. They are brand new (60 miles), and he is letting me have them for $100. 00 for all four with Chevy aluminum rims. I have 265's stock and was wondering if a smaller tire would have any pitfalls for towing. The tires are E rated, and does anyone know how much it costs to have the speedo recalibrated at Dodge?