On 27/01/2021 13:41, NY wrote:
Why is it that most tyres (in my experience) develop punctures close to
the edge of the tread (where they can't be repaired) rather than in the
middle of the tread (where they can be)?

I had two 255/35R19 Y tyres on the old car that had punctures in the
centre of the tread. Simple fixes. Then I a screw go in right on the
edge of the sidewall of the latest car when I had had it for only 4
days. Ruined a 255/40R18Y RF that had only 2250 miles on it. Not a cheap
replacement.