It’s not necessary to waste your time explaining taxable ratings to me. I get it.
The reason I like 19.5’s on my truck isn’t just because of their higher weight rating, which is 15K @110 psi on the rear axle. I like them because they’re tough, long wearing tires with steel belts in the sidewalls as well as the tread area. They’ll last longer and they’re less prone to damage on the gravel roads I drive than most any other tire. I spend enough time off road that I want the toughest tire I can get. The all-steel construction also makes the tire sidewalls much stiffer than other tires, which improves the stability greatly. I don’t miss the ability to air down, because I’ve never had to do that.
While Ford set the rear axle GAWR on my truck at 9100, Dana rates the S110 axle at over 14K in some applications. Will I ever load mine up that much? No, but I would load it to more than 9100 without a moments hesitation. I’ve never weighed my current truck and camper, but based on what I know each one weighs separately, I’d say I’m within a few hundred pounds of that now.
If the tires on the OP’s F450 are the reason the gvwr is what it is, I’d be curious what’s different between his truck and an F350 of the same model year. Again, no offense to the OP. It appears he bought the truck and camper as a package deal, and he got what he got. He’s looking for a new truck, and I’d probably be doing the same. It sounds like what he’s looking for will end up being pretty close to my truck, mechanically anyway. His door sticker will look significantly different though, because his new truck will likely be a class 4, rather than a class 3 in name only like mine.
:):)
