Different types of puncture
I have kind of come to the conclusion that there are two types of puncture hazard and some protection systems are better at one hazard than the other.
One type is fairly large sharp objects like glass and metal, the other is small fine ones like thorns.
I think that kevlar is good for the first type but doesn't help for the second, for which you need a thicker compound in the tyre or use a liner under it.
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