My class A has a 22.5 tire all the way around, a friend at a trucking company (he buys loads of tires the same size that is on our motorhome) A Continental is $520 he will mount and balance free, ...
Tire threads usually generate a "spirited" conversation. That said, my only comment will be to choose the tire with which you are most comfortable with. Just be sure you're picking the tire with your brain and not your wallet....Dennis