There is a maximum size of injury that may be repaired in a car tyre, and it is small. BS AU 159 sets it as a diameter in millimetres, measured after the damage has been cleaned out rather than as it first appears from outside. Below that figure, a properly fitted plug and patch restores the tyre for the rest of its working life. Above it there is no permitted repair, from us or from anybody else.
The instinct people have is that a bigger hole simply needs a bigger patch, and it does not work like that. A tyre carries its load through the cords in the casing. A small puncture pushes a few cords aside without severing many of them, so the structure around the hole is still doing its job and the patch only has to restore the seal and bridge a small gap. A larger injury cuts through enough cords that the surrounding structure is genuinely weakened, and no patch bonded to the inner liner can carry loads the cords used to carry. That is the entire reason for the limit, and it is why the hole gets measured rather than eyed up.
What makes a puncture an emergency is rarely the puncture. We work on that basis across SE13: urgent jobs are prioritised for dispatch, you get a live ETA rather than a window, and the repair is done to British Standard where the car is parked instead of at the end of a trip you do not have time for. Christmas Day in Ladywell, any day in Hither Green: the line is open. Ring at 3am from Loampit Vale and someone answers; Lee at noon is no different.
Emergency tyre repair in Lewisham is part of our wider puncture repair across London and the home counties cover. For emergency tyre repair in Lewisham, call 07717 389637 or get a price for your tyre.
Debris around the A21 and the shopping centre is mostly small stuff, screws and staples shed from delivery loads, and that is exactly the kind of injury the standard lets us repair. It is the bolt or the road spike that ends the conversation. Either way the measuring happens at your kerb with the tyre off the wheel, never from a description over the phone.
Two punctures in one week on the same car near Loampit Vale. The screw sat inside the limit and was repaired. The bolt had opened a hole you could get a pencil into, and the cord damage around it ruled the tyre out immediately.
The visible entry looked tidy enough. Reaming it back to sound material showed the true diameter was well past what is allowed, because the object had been turning in the hole for days. The measurement that counts is taken after cleaning, never before.
Separate punctures, each within the size limit, still fail when they sit near one another, because the cord damage between them joins up. We explained that at the car in Lee and fitted a new tyre rather than putting two patches into one weakened area.
Because a patch seals, it does not carry load. The cords in the casing do that work, and a large injury severs too many of them. Adding rubber over the top restores the air seal while leaving the structure underneath still weakened.
After cleaning, with the tyre off the rim. The hole is reamed back to sound material first, since a ragged wound always looks smaller from outside than it really is, and the diameter of what remains is what gets compared to the standard.
It is not a repair to standard and we will not do it. An external plug skips the inspection, skips the measurement and skips the liner check, and those three things are what decide whether the tyre is safe to keep.
Position and size are separate tests and a tyre has to pass both of them. There is a band across the centre of the tread where repairs are permitted. Outside that band, the size of the hole stops mattering entirely.
Usually, because the size is read off the sidewall when you call and loaded before we set off. Common SE13 fitments and wider 4x4 sizes are both routine work, so a refused repair rarely turns into a second appointment.
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