Originally Posted by pdlamb

I've got to disagree with you. I've had a couple tires develop sidewall bubbles near the end of tire life, including one tire I took off and set aside for a couple years. It didn't have a bubble when I took it off, but within a half a day of putting it back on, there was a bubble at lunch. Only an hour or so left, so it'll last until the end of the ride, I thought. Nope! (And to make it worse, it was only a few yards past a road kill skunk.) Since it didn't show that bubble for the first 1,000 miles or so, I have a hard time ascribing it to a manufacturing defect.