Hitting a pothole hard is the one case where a tyre that still looks perfectly normal deserves a proper look. The impact pinches the sidewall between the rim and the edge of the hole, and the damage that does is inside the tyre where you cannot see it. Sometimes the pressure goes immediately, sometimes it holds for a day and then lets go on a fast road, and occasionally there is a slight bulge appearing on the wall that is easy to miss in poor light. Falloden Way carries A1 traffic over a surface that has seen better days, so this happens here more than most places.
If you have felt a real bang go through the car, the useful thing to do is pull over somewhere safe and stop rather than press on and hope. That is far easier said than done in N2, squeezed as it is between the A1 and the High Road A1000, with most routes out running through busy junctions. Take the first side street you can, or the car park at Cherry Tree Wood, and leave the car there. Ring us and say that it was a pothole rather than a nail, because that points us at the sidewall rather than the tread and we arrive expecting what we will find.
A tyre can go flat without ever being punctured. We come to where the car is, Cherry Tree Wood, Fortis Green or anywhere between, get the wheel off and find which it is, then clean and reseat, replace the valve, repair to standard or fit a replacement as the case requires. Tight in Manor Park, easy in The Bishops Avenue: neither stops the job. Level in East End Road, sloping in Fortis Green: we set the car straight first. N2 takes in Cherry Tree Wood and Manor Park, and we work the lot.

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East Finchley sits squeezed between the A1 and the A1000, so almost every route out of N2 runs through one of North London's busier junctions, and the surface on Falloden Way is exactly the kind that catches a tyre at speed. The residential streets around Cherry Tree Wood and East End Road are permit-controlled and tight, and changing a wheel in the gutter there is not a realistic proposition for most drivers. That leaves stopping and calling as the only sensible answer, which is fine, because a van from our North London base is only minutes away from most of N2.
The driver carried on because the tyre looked fine. It went down properly the following morning. Caught on the day it would have been the same wheel off and a much calmer conversation about it.
A faint swelling on the outer wall after a heavy strike, noticed only because somebody thought to look. That is not something to drive on, and the car stayed parked until the wheel was changed.
The delivery traffic along the shopping street leaves the usual crop of nails and screws. This one was a slow leak found on the drive at home, which is the easiest version and usually still repairable.
It is worth checking properly. A hard impact pinches the sidewall against the rim and damages the tyre from the inside where you cannot see it, so a tyre that holds pressure today can let go tomorrow on a fast road.
Any swelling or soft lump on the wall of the tyre, and a pressure that is dropping. If you find a bulge, do not drive on it. Leave the car where it is and we will come out and change it.
No. Whether it is a puncture or impact damage, the wheel comes off where the car stands and a sound tyre goes back on. Nothing needs towing anywhere.
Yes, and it is a common call. Tell us the direction you were travelling and the nearest side road so a driver approaches from the right side. Typical arrival across N2 is 30 to 60 minutes.
Yes, both are routine. The car stays where it is parked and we work beside it, so a tight permit street is no obstacle at all.
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