There is a point at which a repair stops being good value, and it has nothing to do with the puncture. A tyre with 2mm of tread left is close to the end of its working life. The legal minimum is 1.6mm across the central three quarters, and wet performance has already fallen off well before that. Putting a proper repair into a tyre in that state means paying for the work twice, because the tyre will be replaced within months anyway.
So we measure the tread before we start rather than after we finish. If there is real life left, a repair is straightforwardly the sensible answer and costs a fraction of a new tyre. If it is nearly done, we will say so and let you decide, because sometimes a repair to get through a few more weeks is genuinely what somebody wants and that is a reasonable position. What is not reasonable is charging for a repair without mentioning that the tyre it is going into has almost nothing left. On a car parked around Upper Holloway or Whitehall Park, that measurement takes about a minute.
A puncture found at home on a Sunday used to mean a wasted day and a Monday off. We work seven days and through the night, so the repair happens while the car is still sat where you found it in Upper Holloway. A Hargrave Park cul-de-sac or a St John's Way main road, tell us which. A tight terrace in Highgate Hill foot or a narrow bay on Holloway Road A1 is usually workable.

Puncture repair in Archway is part of our wider puncture repair across London and the home counties cover. For puncture repair in Archway, call 07717 389637 or ask us for a quote.
Archway sits at the foot of a long climb, and cars that spend their lives going up and down Highgate Hill and around the gyratory tend to wear their front tyres unevenly, with more gone at one shoulder than in the middle. That is why a single measurement is misleading here and why we take several. It is also why a tyre that looks fine from the pavement side can be close to the limit on the inner edge that nobody sees.
A puncture on a car off St John's Way turned out to be in a tyre with 2mm left. The owner chose a replacement instead, which was the right call and their call to make.
A screw in a tyre near Hargrave Park with well over half its tread remaining. Repaired properly from the inside and back on the car inside the hour.
A car near the Highgate Hill foot had two punctures on the same day, one in a nearly new tyre and one in a nearly finished one. Two different answers, both explained before either was done.
There is no rule, but around 2mm you are paying for a repair that will be thrown away with the tyre inside a few months. We measure and tell you, and if you want it repaired anyway to get through a few weeks, that is a perfectly sensible decision to make with the figures in front of you.
1.6mm across the central three quarters of the tread width and around the whole circumference. That is a limit rather than a target, and grip in the wet has fallen off considerably by the time a tyre gets there.
With a depth gauge at several points across the tyre, not with a coin and a glance. Tyres often wear unevenly, and one measurement in the middle can flatter a tyre that is nearly gone at one shoulder.
If the tyre is unsafe for a reason other than the puncture, yes. Exposed cord, a bulge or damage in the sidewall means we will not patch it regardless of what the tread depth says.
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