Don't want to muddy the waters here but as concerns the original question from Mr. Loadmaster, I'm wondering if the rear hub of a single wheel will accomodate the two sets of wheels. It appears that a dually hub is a bit longer and that the center of the wheel is actually supported by an area on the hub that is specifically machined to accomodate both wheels. They fit snugly around that machined surface and as such are hub supported rather that lug supported. Don't know if that makes sense and I could be totally wrong here in my limited experience with my dually rear end.
