" I would like to view such a change with the two wheels stuck together and see how to handle that problem."
I have changed out hundreds of big rig and various types of dual wheel set ups in my career. The set up called "budd wheels" on big rigs were notorious
for sticking together especially when I wrenched in Upstate New York due to salt corrosion. The solution was a sledgehammer to the rim or if the tire
was still inflated the tire itself. And these were steel wheels. The aluminum wheels were not a problem. The smaller dual wheel type on a RV were rarely an
issue. Carry a sledgehammer if you are able to swing it a little and usually a few whacks and it will break free.