As you step in on the left side it tells you what size tire and wheel the 315/80/22.5 takes a 9 inch wide wheel the 12R's take a 8-1/4 wide wheel
How can I tell what size wheels they are? As I understand there are 8.5 inchers and 9 inchers.And where would be a good place for a guy to pick up 2 of these on the cheap?
Seb -First question? Clean all the muck & gunk off the outer dual's wheel, then carefully inspect it all around the entire wheel in the area between the valve stem and the outer rim. 99.9% chance you're going to find the wheel size stamped into the wheel in this area. (On my coach it's directly opposite the valve stem, obviously YMMV.)Second question? Just about any truck boneyard will have lots of wheels lying around. You just have to be careful to make sure you're getting either stud-pilot (aka "Budd") wheels or hub-piloted rims. Quick check to see what you have is look at the lug nuts - if they look like giant automobile nuts with a taper that goes down into the wheel, they're stud-piloted. If they look like they've got an attached washer, you've got hub-piloted rims.OTOH, Brand new steel wheels are only about $100-$125 or so, depending on the vendor.FWIW & HTH. . . RJ
My bus doesn't have a spare wheel behind the front bumper. That's where they put the ninety gallon fresh water tank....Maybe there's a better use for that volume of space?
What Richard said.
Look at the drive axle if you have a square head sticking through the nut you have stud pilot wheels is the easy way to tell ,the extreme duty stud pilot lug nuts MCI used look like hub pilot nuts fwiw