I had very bad luck with the Continetals from the factory on my 2010 TC. Many of these tires failed in the 15K to 25K miles range. Belts broke internally and on the last one multiple little pinholes developed creating slow leaks. Unfortunately, I replaced the Continentals with Continentals. Finally, I switched to a different brand after the 4th replacement. At first I thought it might be potholes, but that changed after the roads in my area were all rebuilt nad newly paved. The multiple pinhole problem, was the best clue that something odd is happening. One suggestion is the high-pressure required in the rear tires, may be over the actual design limit. Interstate speed limit here is 70MPH, not sure if that has any effect or a contributing factor. New brand of tires has only 1K miles and too early to review.
