Bought a Four Winds Chateau Sport a month ago. Coming home we had a bad vibration that turned out to be a bad tire. RV had new tires on the front, 2011 tires on the back. Replaced all four tires on...
This is gonna sound stupid-simple, but... Make sure no foreign object got trapped between wheels and hubs or between the faces of the dual rear wheels. I had a tire installer pinch a braided valve extender between the duals. He caught it right away and replaced it but I imagine such a thing could cause a wobble.