They were recommended to me by several guys at the track. The thing that has me concerned now is the Discount Tire unlimited warranty I paid $16 per tire for. What they told me at the store and what it says on paper are 2 different things. They say they have it in their computer and as long as the tire has 1/16" tread or more on it they will replace it for free for 10 years. I asked them if I could have something in writing that says that and the slick salesman I was referred to spent 5 minutes over the phone basically telling me "no".