I have a vibration that starts around 70-75mph and gradually gets worse. Mine is from the rear wheels. When I had the shop install my tires, I was watching the machine as they spun up the wheel/tire assemblies. The tire was walking left to right as it was spinning. The guy told me that there is too much runout in two of the four wheels, so he told me to put these on the rear. He then told me that it should be ok up to 65-70 but above that is will start vibrating. All I can say is that he was correct. In my future I will be buying two new Rallyes and setting these two aside.