9R22.5 is a pretty common tire size. I have a national fleet account with Michelin for my fleet, but I have bought tires for tractors, bumper pull trailers and forklifts, etc from Simple Tire. They are a little cheaper on their website because they don't have to pay eBay fees. I looked at their website and I would recommend the Bridgestone Escopia. It is in the same class as Michelin. Toyo are a few bucks cheaper, but they are considered a lower tier tire. They are usually listed as 9R22.5 instead of 900R22.5. If you are looking for more traction on the drive Toyo will probably be the best deal. Unless you are expecting to be driving in snow you probably don't need a traction tire on the rear. I run Michelin XDA Energy on all of my drive axles. If you take a look at the tread on them, they are not very aggressive. The Michelin metric equivilent is 235/80R22.5, but I would stay away from the low profile metrics on an old vehicle. The 9R22.5 will stand up as tall as a 8.25x20.
