Well, after long searching and deliberation, I don't think 22. 5s are for me. The aluminum "bolt on" 22. 5 wheels with an 8x6. 5 lug pattern are so rare, that you just can't find a deal easily... and since I'm looking for something economical, it surely doesn't make sense to buy new.
I did find a very nice set of Rickson 19. 5s though. They're 265/70 Toyo M608Z traction tires mounted and balanced by Rickson on Vision aluminum 7. 5" rims. Hopefully, it should see a fuel mileage increase, and it'll be 6 or 7 years before I'm buying tires again
Oh... as a side note for those who don't know. Just because a tire says its "10 ply", it doesn't really mean 10 plys on the rolling surface. Let's just say I've heard that if you start seeing the 4th layer down which exhibits diagonal wire cords, don't go over 45 mph pulling a triple axle trailer

You don't want to find out by experience that you don't have 6 more layers to wear through.
--Eric