Hitting a kerb hard enough to leave a mark on the alloy has almost always done something to the tyre as well. The wheel takes the visible damage; the sidewall takes the load. That is one of the more useful things to know in a town where the parking is this tight and the lanes are this narrow, because a great many people have the alloy refurbished and never think about the rubber that absorbed the same impact.
What we do about it is look, properly, and then say what we find. Any lump standing proud of the flank tells you the layers inside have come apart, which puts that tyre out of service immediately. A gouge could be superficial or could have reached the belts underneath, and that gets decided with the tyre off the wheel rather than from a crouch on the pavement. Age-related crazing on a car that mostly stands still is often just the surface. Sometimes the honest conclusion is that there is no problem at all, and you keep your money.
Somebody usually points it out before you notice it yourself. A neighbour, a colleague in the car park, a passer-by who saw the bulge as you pulled in in Foxholes. We come to the car, confirm it, and fit the correct replacement where it is parked, on Ware Road or on a driveway, balanced and pressure-set before we leave. You watch it happen in Bengeo, or at the kerb in Sele Farm. Same tools in Sele Farm as in Pinehurst, same on every call.

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The narrow lanes, tight parking and steep ground around Bengeo produce a steady supply of kerbed wheels and stressed sidewalls, and the fast running on the A10 and the A414 is where a weakened tyre tends to finally let go. We come out to inspect, give a plain answer either way, and fit a replacement only where the tyre has actually reached the end of its life.
A wheel had been repaired and repainted after a kerb strike, but nobody had checked the tyre. Stripped off, the inner face showed a clear pinch mark and separated structure. It would have failed eventually and probably at speed.
One heavy impact somewhere on the way in, and a swelling on the sidewall within a few miles. No repair exists for that, so it was replaced the same day and the rim checked while the tyre was off.
A little-used second car with crazing all over the sidewalls and almost no tread wear. Perishing at the surface with the structure sound, so the advice was to watch it rather than buy four tyres.
Very. It is the clearest warning a tyre gives before it comes apart, and it can let go at any speed without further notice. Nothing patches it, because what has broken is the structure underneath rather than the rubber on the outside.
Sometimes enough to say it is definitely bad. Almost never enough to say it is definitely fine. Depth is the whole question with a cut, and depth does not photograph.
Not at all. Plenty of these visits end with the same tyre going back on and nothing sold. We would rather have that conversation than the one where somebody has a blowout on the A414 a fortnight later.
More often a sign of alignment or pressures being out. If one shoulder is disappearing faster than the other, replacing the tyre without addressing the cause just means doing it again. We will point out what we can see.
Yes, day or night, all year round. If something has shown up on a tyre and you would rather not guess about tomorrow's drive, ringing us this evening is the sensible move.
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