They were on the stock rims for 4 years, I just had them put onto MB Gunner 6's. These ones are stamped 2500lbs max each. I would assume the stock ones would be at least 2000+. I usually run around 50-55 for towing. If you run them too high all you'll do is rattle your teeth and wear the middle of the tread bald before the edges. Yeah. I'm stuck with the light too.For those of you using E rated tires, did you change rims? I have a 2006 Off Road Armada, and I replaced the stock tires with load range D tires. When I had them inflated at 60 on my last trip, my TPMS light came on. When I got it reset at the dealer, I was told the system will come on because that pressure will set it off due to being on the high side. Can the Armada/Titan stock rims handle load range E tires? I am not too concerned about it as I found that running them around 50 psi gave me plenty of stiffness vs. the P rated tires, but the light was a bit annoying.