IronWing
No Lifer
I was driving a Jeep on a rocky dirt road today and I had to stop to open a gate. I noticed that my front passenger's side tire was hissing like crazy. "Crap", said I and I looked and felt for the the leak. It turned out that the valve stem had been hit by a rock, bending the threads inward and driving the cap into the core and thus deflating the tire. I pulled the damaged cap off and the core popped back up, stopping the leak. The tire held fine for the trip home.