I would say from experience, prerogative Nero as run flat tires should be re called, I was told by Pirelli, after replacing 5 tires in less than 40, 000 miles, replaced two tires at 23000 miles, another at 19000 miles, the other two for tread ware at 24, 000 miles . Three of the tires had bubbles pop up and the bubbles split at the rim ! Pirelli says stay away from pot holes, well that is impossible. Some pot holes are impossible to avoid. Well Pirelli says I must have hit pothole ‘s, they said to save the tire don't hit potholes, so to avoid potholes you have a very good chance of hitting another vehicle, pedestrian, run into a ditch etc... in other words Pirelli will not warranty these tires or offer any help other than checking tread depth ! I would not buy Pirelli tires, Cadillac stopped installing these tires on their vehicles anymore ! If you do have this tire on your vehicle, pls be careful !