some flints / glass you roll over won't puncture your tyre immediately, they can sit in the rubber for week, slowly working there way inwards eventually giving you a puncture...if not that, incorrectly place, non-centred rim rim tape.
@deleted started
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some flints / glass you roll over won't puncture your tyre immediately, they can sit in the rubber for week, slowly working there way inwards eventually giving you a puncture...if not that, incorrectly place, non-centred rim rim tape.