Pickup truck tow vehicle stability tests

I will say this from experience towing the same exact 5er with a stock 2005 Ram 2500, stock 2010 Ram 3500 cab chassis drw, stock 2013 Ram 3500 sew and the same 2005 Ram 2500 with modified suspension and will tell you that 99% of stability comes from the suspension and not the tires. If you are towing a trailer that a srw is rated to handle and you are in an accident that causes the truck to overturn chances are very great the a drw will go over also. The operators driving ability is going to come into play more than the extra tire sticking out of the rear of the truck.