Thanks for the suggestion. The largest size they make in the Firestone HT and AT tires is my factory size.Have you considered Firestone Transforce HT's? I have them on my 2012 Ram 2500 and like them They are wearing much better and are way quitter than the Transfor AT's I had on the truck before them. I tow an 11K TT with the truck but 95% of it is on highway's. The truck is also my DD.
just my $0.02