I tow with my 6 ply stock tires no problem. You just don't overload the back axle of the truck above the load ratings. A weight distributing hitch takes some load off.
If the **** of your truck isn't sagging then your probably fine unless your tires are garbage.
I never liked big rims and low profile rubber on a truck because of tire load ratings and bad roads.
Oops reread : a 5th wheel, 10 plys and a F250.
Last edited by dcfluid; 09-15-2011 at 12:18 AM.