Originally posted by naisme
I had a flat I had to change last night near a misquito infested swamp, this was the third in a week, same spot, so I have some investigating to do. I felt the inside of the tyre examined the tread. This is the thrid tube with a hole in the same spot and no obvious reason for it.
I had a similar problem and it turned out to be a small piece of glass that you couldn't feel - it stayed totally within the tread. But when the tire was under high pressure, with me riding it, and hitting bumps along the way, apparently that little piece of glass would push out into the tube and eventually puncture it. But when I would search for the cause, it would be hitten again.
Someone else actually found it for me, by flexing the tire various ways, including pretty much inverting the tire inside out, and under a good light in showed up.
Bob