What happens
Found it flat in Northfield? Leave it where it is.
Flat tyres in Northfield can be found first thing, on the drive in West Heath before the school run, or last thing in the small car park at Northfield station. Sometimes a screw from Frankley Beeches Road has been leaking for days; sometimes a valve has failed; sometimes the tyre was kerbed on Bristol Road South the day before. Whatever the cause, moving the car on a flat wrecks the sidewall and may scrape the rim, turning a simple leak into a new tyre.
Leave the car where it is and message the street, the size code and a picture of the tyre. Once there, the fitter reinflates the tyre, hunts the leak with soapy water and decides: a tread puncture inside the BS AU 159 limits is patched from within, shoulder or sidewall damage means a tyre off the van. Either way the cost was agreed by phone before the journey to B31, and there is no charge for asking.
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 Northfield as well.
Other services from the same Brent Cross team: broken tyre replacement in Northfield and van tyre fitting in Northfield.