need sanity check on weight calcs

I have one of those trucks. I think if you take the weight off each tire inflated to 80 psi, and take that times 4 tires, your coming up with a number around 10K lbs. So its not the tires that is the limiting factor.

And the only thing I am doing to mine is adding a bigwig sway bar.but my camper is only just over 3K, plus tong weight. I noticed my truck rides level with just over 3K camper in bed.