Do any of you have alignment numbers?
And for everyone the shake starts at 65-75mph and I imagine you don't want to go much higher after that, but does it get progressively worse if anyone has?
And that is the only characteristic everyone has, no pulling to the right at slow speeds, nothing else?
Sounds like most everyone is trying new tires and wheels, definitely an important step, even though it does not seem to be solving anyone's problems. I've heard never mix speed ratings, but they all just say that handling may be affected. I have two different speed ratings and three different kinds of tires and it handles the same as when I had the four OEM. And it rides smoothly at 100mph. Wish I knew what was wrong with yours...