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4

And you forgot to mention spoke pokes, due to a poorly built rim or weak rim tape. And then there's punctures due to poor tool use when installing the tire.
– Daniel R Hicks
Commented Jun 28, 2020 at 14:39
4

For reference, I took a caliper to a piece of my retired Schwalbe Marathon summer tyre. The groove near the edge of the sidewall is about 2mm deep. The recommendation for cars is to start thinking about replacing your tyres when the main groove is 4mm deep.
– HAEM
Commented Jun 28, 2020 at 14:55
7

@HAEM: Car tyres need grooves because they have to evacuate water through these. Else the phenomenon known as aquaplaning happens. On formula cars, slick tyres can be used on dry surface only. Bicycle tyres for road use don't need any grooves at all. The contact patch on the road is very small and the pressure on that surface is great enough to push away any water from under the tyre.
– Carel
Commented Jun 29, 2020 at 7:46
5

@Carel The point I was trying to illustrate is how much thicker a car's tyre is compared to a bicycle's.
– HAEM
Commented Jun 29, 2020 at 8:46
10

@Carel "cycling tyres would be considered worn-out right from the beginning" is the point I'm trying to make.
– HAEM
Commented Jun 29, 2020 at 11:23

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