Originally posted by Horseonthefly Just out of curiosity, was the sidewall puncture from an external source or a failure?
I think it was an external source. But I can't tell what it is.
I found out that the tire was low when I was doing about 75 mph on the freeway, didn't know what had hit the tire.
This morning when I pulled of my garage, I saw a car with a flat tire in front of my house. The driver was a teenager just getting his driver license a few days ago. He know absolutely nothing about cars, not even whether his car had a spare tire and where the spare tire was. I then spent 30 minutes teaching him how to replace the tire. The spare tire's air pressure was 20 psi (vs. 60 psi as required). I had to put in some air. Interestingly, the tire was damaged in the sidewall, almost identical to what I had last week.
Reminder: when you check air pressure in the tires, please also check the spare. And if you, or anyone you know, don't know how to replace the tire, please practice in the driveway, not on the road.