You said you got new wheels, I assume you meant tires and did the pulling to the right start after the new tires were put on?
Our coach was pulling to the right after we bought it. So I took it to get an alignment. It was out of alignment, but afterwards still pulled to the right, just not as much. Eventually the original Goodyear RV670 showed signs of rivering which got worse as time went on. Last year I had the front tires replaced with Michelins and now the motorhome does not pull to the right.
Anyhow, I believe some of the Goodyears have some kind of manufacturing defect that causes the pulling to the right which causes the rivering.
And I did have the Goodyear RV670s on a previous motorhome that did not have this problem.
David