I see you got your tire situation covered. And it is amazing how many "tire salesmen" have no idea about what they sell. I had a blowout on the way to Delaware one year. Replaced it with the spare and got to the campground. Called the local tire place and they had one tire in the size and weight rating I needed. I drove over with the blowout one the rim and they changed it out. Before I left I asked him what pressure he had it set at. He said 60 lbs. I asked him to make it 80 lbs. The max cold psi on the sidewall. He said "It's no wonder you had a blowout. If you run them at 80 lbs they will blow out when the tire warms up above 80."
I told him to put 80 in it and the next time his tire manufacturer rep comes in, ask him about max cold tire pressure and what you should be inflating tires to.
