How the job is done
Found it flat in Northampton? Leave it where it is.
In Northampton a flat can greet you at the car. Commuters off an evening train find one corner on the rim at the station car park; night staff at Northampton General come off shift to a soft tyre; residents in Kingsthorpe wake to a flat on the street. The instinct is to creep to a tyre depot along the A5076, but a few hundred yards on no air usually ruins the tyre.
Send the location, the sidewall numbers and anything visible in the tread, then leave the car alone. The fitter works out the cause at the car. A screw near the centre line is repaired to BS AU 159; a leaking valve core is changed; a torn sidewall, or a liner ground up by running flat, means a new tyre. The choice and its price are put to you before the fitter starts.
On run-flat tyres? They behave differently once deflated, so check the handbook's limits and read our page on run-flat tyres; we fit replacement run-flat tyres at the car in Northampton as well.
Related help from the same Brent Cross team covers broken tyre replacement in Northampton and burst tyre replacement.