Mike, I get a little confused between budd wheels, hub pilot and stud pilot. I thought I read somewhere that the unimount are the same as hub pilot. I don't know, that may be a brand name. There is a whole new vocabulary when talking about big truck tires and I don't have any background in that area
Right now the truck has split rims with 9.00 x 20 tube tires. I was told by one of the big truck tire shops that I would need 22.5 x 7.25 wheels. 22.5 x 8.25 seems to be more available but they seemed to think that would not work with my spacer or the offset would not work. My biggest problem is my ignorance.