Calm down Mr. Simpson. It's not like I'm putting my family's life in jeopardy on every trip to the grocery store. Here in Georgia it's 70 mph and I'm really noticing it between 76-83. On a hard acceleration it's even more noticeable. I talking it really shakes the cabin.
Mr. Berry...I did try that with using my spare on one trial run, came back, put the spare on the opposite side for the second run and it continued to have that shake. I then checked both rear tires and rims on the vehicle lift. Again, it checked out fine. So I feel pretty certain that it's not in them.