Just want to share my experience with you. The Potenza that came on some IS F will be almost impossible to get if you suffer a blow out. Don't ask me why the tire don't exist as a replacement. I have tried. USA does not have any tires for sale. It comes from Japan only with a back order of 4-6 months. That info came from the Lexus Rep. Can't confirm the fact. But I do know that since Lexus could not find me a tire (Potenza). All four tires were replaced to the Michellin PS2. Why? Because the Potenza don't exist in America. Really hard to believe, but true. I have tried every tire dealer in USA. But Lexus came through with their high customer service mission statement to provide the highest quality of customer service. The Michellin is by far the better tire of the two that came with the IS F. You can find replacement for the Michellin through Lexus only.