This is a fantastic tire and I got an opportunity to test it in a controlled environment on an Audi A4. I was able to compare it against other competing tires (Continental, Goodyear, and others). The difference was amazing. These tires performed beautifully on the test track and provided a level of grip I had not experienced every before. After an entire da of controlled testing and comparison, they held up beautifully with little or no sidewall deterioration. At least one set of the competing tires had horrible sidewall damage. These tires are well worth the money and help make a regular drive an exciting adventure on the road. They are fantastic tires and I will be putting them on my car soon.