^ Good call SR.

That's why I always install my tubes in the same place in relation to the tire (valve next to the tire logo). That way if I do get a puncture, it easy to check roughly where abouts an embedded splinter might be.

My son's BMX had repeated slow flats which drove him up the wall. Turned out to be a small steel wire embedded diagonally in the tire, just like a splinter. You can't see it by eye but knowing roughly where it should be I was able to "feel" it - then took it out with tweezers and a magnifying glass.

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