I put this on Facebook but for those who are not on FB will repeat. We have a 2010 PT Cruiser we bought fall of 2010 which has only 21,000 miles on it. Original tires. Tires looked almost brand new. During Mel's trips to radiation and over past few months, we had noticed that once in a while the tire pressure monitor would go off. Mel would check and sometimes,a tire usually on right side, was down maybe 2 to 3 lbs. He would air it up and the sensor stayed quiet for anything from a month to lately a week or less. He ran his hands over the tire and nothing seemed unusual. This past Tuesday sensor came on and he aired it again. Light went off. Thursday it came on again so we finally had time to take it to Les Schwab. Tech came out and ran hands over tires and found nothing. Said could be a nail we don't see or sensor or the valve. He said let me put it on the lift. We went inside. He got it up and immediately came in and asked us to come into the shop and look. Deep within those barely worn trends you could see on each tire where the tiny pieces of steel belt were starting to poke through and on the inside of at least one you could see where there was a place about half inch long where the entire tred was trying to peel. We were shocked at only 21,000 miles! He looked and the tires were manufactured in 2009 and put on a 2010 car, which means they were over a year old when first out on the road. He reassured us we did nothing wrong. Said there is no sign you let them run low or did anything else to contribute to failure, it was simply age and the natural rubber oils evaporating allowing moisture to get to the belts and they were failing. I asked if we drove more would it help and he said NOPE this is simply age. So a hour or so later we have brand new tires and peace of mind and a important lesson well learned. Being retired and not making many trips, We will likely age out tires rather than wear them out and will pay attention to tire age. It's not just RV tires that can age out!! Stay safe and get tires checked and know their date of manufacture which is on the side wall. I'm a bit put out that Chrysler put tires up to a year and a half old on a brand new car. But I'm glad we did not keep assuming that deep tred was good, cuz you know what happens when you assume anything.
Velda