These tires are absolutely horrible. One of them started dipping out at 800 miles, and was subsequently replaced by my dealer. The mate to it started dipping out at 2000 miles. My dealer stopped selling Summit tires, so I got stuck with the bad tire. The replacement tire from the first bad one had also started to dip at approximately 2000 miles on it. I had the rims checked, and they were both perfect, so that wasn't the cause. The two front tires are still on the car, but are completely worn smooth at 9000 miles. My last set before these were Kumho's that lasted 30,000 miles. These Summit Siempre tires just stink.