I bought a set of Rh5 widow maker rims and tires for the tires. They came off a state owned dump truck that was an older Ford, a f700 I think. Anyway, the lug pattern was 6, 8 3/4". The center hole was too large for my 450, but the wheels would physically mount on the hubs. The fellow at the state depot said that most of those old trucks had 22.5" but this was a little used dump that they kept until recently. It gave me hope that I could find a set of 22.5" wheels that would fit, just by making an adaptor ting for the center.