I don't really have an opinion on tires. There are so many to choose from. The narrowest 22.5 tire available though today is a 9R22.5 so I'd look at them. Maybe somebody has input on other metric sized tires too.
The 1/32" difference won't matter on a stud piloted mounting. On hub piloted it would, but not on a "ball seat" stud piloted mount like yours.
When you can get to your other wheels and have found numbers I'll look them up for you also. If you don't find numbers on some it probably means they are Kelsey-Hayes. They put their part numbers on a paper tag on the inner mounting surface below the tire. Doesn't help us much today. Stu
Edit - I just saw you're in California. My friend with the used wheels is in Ohio. A long way to ship. I'd have to think yards in CA would have a good supply of used six lug 22.5s. It's not yet an uncommon size. Stu
Last edited by truckdog; 10/29/2010 6:00 PM.