Hey guys. I just wanted to pass on a warning about BF Goodrich Dueller APT tires. I just completed a trip to Florida where I had two flat tires due to a faulty valvestem. I have a 2002 Suburban and never had a clue the tire was flat until a driver pulled along side and warned me. You couldn’t even tell there was a problem and I don’t have a tire pressure warning on the dash. After the 2nd flat, the next Sears Auto said there was a recurring problem. They replaced all the valvestems with metal (chrome) instead of the rubber. These tires came very highly rated by Consumers Reports and they’re a popular seller. I hope this is helpful to someone. I could’ve used this info on my trip.