Originally Posted By: Hokiefyd
True, there should be no problem with a B grade tire. I would prefer the tire with the greater heat capability, but as I said above, each individual buyer will have to make that choice for themselves. The OP does live in Missouri (which experiences pretty hot summers), and he did say that the truck is driven mostly on pavement. He also did not exclude towing from the truck's duty, so I feel that the temperature grade difference is at least worth mentioning.
I think that for most people, and among these two tires, the Firestones are the best value. I've recommended these tires to co-workers (and they're happy with them), and I've owned Firestones myself (though not any from the Destination line). My intent with my post was not to persuade one way or another, but to point out the true relative cost difference between the two, and note that each buyer will have to assign his or her own value to the Michelin tire's longer life and better heat resistance grade. Each of us will weigh those attributes differently.
As someone who pulls a travel trailer spring, summer, and fall, I prefer that added margin that an "A" temperature rated tire *should* provide.
I've had to deal with tire failures on the rear axle, while pulling a travel trailer and a boat, in the past. Granted, tire technology has advanced in the past 20 years. But, it is one reason why I don't skrimp now.
As I mentioned a week or so ago, at current wear rates, I should have 67,000 miles on my LTX's when they hit 3/32" of tread.