Is the vibration in the rear? or front? What side?
Lift the back axle off the ground and secure the bus well.
Have someone put it in gear and slowly spin the back tires. Put a object on the ground close to the side of the tire. The tire should only be a few inches off the ground. That object is there for your eye to reference distance to.
What your looking for is wheel wobble.
You can check the front tires the same way, just spin by hand.
Now get in the drivers seat and spin them back tires at interstate speed.
Here is what I suspect from reading your posts.
You may have a bent axle on the side that had the bent rims.
A separating tire can also cause massive vibration. The tires that were on the bent rims would be the ones I check first.
I don't think a wheel simulator weighs enough to cause a vibration, but it would not hurt to remove them and see if it helps. What they are good at is holding dirt, snow, ect that causes vibration and RUST.
"Don't argue with stupid people. They will just drag you down to their level, and beat you up with experience."
Patently waiting for the apocalypses to level the playing field in this physiological game of life commonly known as Civilization