So Gene, just so we are all on the same page what type wheels do you have (cast spoke or disc w/lugs)? If your truck is stock it could have 6-lug Budd wheels (stud piloted) or 5-Spoke Cast Hubs with Dayton Wheels (open center).
Your 9.00 x 20's would be replaced with 10.00 x 22.5" tires, they are the same diameter and width. The correct wheel width for 10.00 x 22.5" tires are the 6.75" or 7.5".
You also want radials, they run much smoother than the Bias tires.
Hope this helps,
Mike B
