This vehicle suffered a flat tire on the left rear at 20,000 miles. It was discovered that the tire had worn out on the inside prematurely due to a faulty negative camber alignment. The other tire on the right rear was examined and found to be worn down to the treads on the inside as well. I informed Tesla and they said this is normal for the make and model. You cannot see the inside of these tires during a normal walk around inspection. Tesla says that the problem cannot be fixed. I could have suffered a tire failure at high speed which could have been catastrophic. Tesla just says its unfortunate and you have to live with this issue. i consider this to be a very unsafe issue that Tesla should address at their expense. This car is under warranty and Tesla refused to repair the car.Tesla did not divulge this issue to me prior to purchasing the vehicle.