How to Tell If Your Tyres Are Run-Flat

Run-flat tyres have reinforced sidewalls that let you keep driving for a limited distance after losing air. If you are not sure whether your car has them, there are three easy ways to check.

1. Look at the sidewall

Manufacturers mark run-flats in different ways. Common markings include RFT, RunFlat, ROF (Goodyear), ZP (Michelin), SSR (Continental), DSST and EMT. Several brands also use their own logos.

2. Check the handbook and spare wheel

Many cars that come with run-flats have no spare wheel and no jack. If your boot has a flat floor with no spare well, that is a strong hint. The handbook will confirm it.

3. Look for a TPMS light

Cars with run-flats are generally fitted with tyre pressure monitoring because you may not notice a flat from the way the car drives.

What you can and cannot do with a flat run-flat

Most run-flats allow limited-distance driving at reduced speed. A typical figure is around 50 miles at no more than 50 mph, but your handbook is the authority. Some manufacturers do not allow run-flats to be repaired after being driven flat, because the sidewall can be damaged internally, so it is best to have the tyre inspected.

Replacing them

If your car was supplied with run-flats, replacing like for like is normally recommended. Fitting a conventional tyre may change handling and, with no spare, leaves you stranded if it punctures.

See our run-flat pros and cons, or ask for mobile tyre fitting and we will confirm what your car needs.