I chatted with Bernie a bit more and I think when I get my taxes back I will order a set of these adapters. He gave me a bit of his background as well and I feel lots more comfortable getting them now. He also has a lifetime warranty for them. This is the direction I want to go and get 22.5" or even 24.5" wheels and low profile radial tires for my bus. Going to keep the drum brakes while I research how to convert to discs for this size of chassis.
I apologize to the original poster for somewhat thread-jacking his post. I hope we got somewhere he was intending on going with our discussion. I know I did.
Thanks everyone and especially Grigg for the help.
Fred