lots of people say that, and it used to be true in the 1999 to 2002ish f350, but there are more differences than that like my truck the rear end is different, the gearing, the options for increased payload packages, the springs, leveling blocks. but I am not following what you are saying either, since I said on a F250/2500 that would be to much weight.. and I'll stick with that, but modifications were done to make it ride better, but it still doesnt chage the "oficial" weight raiting of the truck, I wish it was that easy.. My truck has a heavy payload package with which I ended up with 4500lbs of space on my rear axel for payload, could I put 19.5" tires on and add a custom leaf or two can carry 6K, probably, but I still wouldnt be legal, but we are digressing from the original topic