I had some on the Charger, had about 4k street strip miles on them, still had almost full tread depth [ groove] but what killed them was my fault, would drive on the street in the summer VERY hot road temp, pull in the garage & park it, as a result not jacking up the car & putting on stands the tires got WAY out of round & unusable lessons learned the hard way , they HOOKED awesome, have M&H now, they hook good also but the Radial Street R drove much better on the street