Run flat Tyres

HOW TO CHECK YOUR TYRE SIZE

You can find your car’s tyre size written on the sidewall of your current set of tyres, in your vehicle’s handbook or on a sticker in the door jam or inside the fuel cap door. When buying new tyres you should only go for ones that have these same numbers to ensure a good fit

Please enter your vehicle registration number or tyre size above to see run flat tyres suitable for your vehicle.

Run Flat Tyres

Run flat tyres let you keep driving safely for a short distance after a puncture. Their reinforced sidewalls can support the vehicle’s weight even with little or no air pressure. This means you don’t have to stop immediately or wait for roadside help, you can continue your journey and replace the tyre at a more convenient time.

Identifying run flat tyres

On the Just Tyres website you'll see this symbol under the tyre's key information:

Some new cars come with run flat tyres as standard, but it’s not always obvious if yours does.

To check, look at the markings on the tyre sidewall. There’s no universal code for run flat tyres, each manufacturer uses its own symbol or abbreviation to identify them.

Run flat abbreviations

CTT	Combined Technology Tyre (Dunlop)
DSST	Dunlop Self Supporting Technology
EMT	Extended Mobility Technology (Goodyear)
FEXM	Falken Extended Mobility
HRS	Hankook Runflat System
RFT	Run Flat Technology
ROF	Run On Flat
RSC	Runflat Safety Component
SSR	Self Supporting Runflat
SSRF	Self Supporting Run Flat
TRF	Toyo Run Flat
XRP	Extended Runflat Performance (Kumho)
ZP	Zero Pressure (Michelin)
ZPS	Zero Pressure System (Yokohama)

The benefits of run flat tyres

Getting a flat tyre can be stressful, especially on a motorway or a narrow road. With run flat tyres, you don’t have to stop right away or call for roadside help. When your TPMS alerts you to low pressure, you can keep driving safely for a short distance, unless the tyre is severely damaged.

Their reinforced structure helps the tyre keep its shape, maintaining safe handling and protecting the wheel from damage.

Plus, because you can drive without a spare, run flat tyres help save space, weight, and cost in your vehicle.

Can you repair run flat tyres?

No, run flat tyres cannot be repaired. While they let you drive a short distance on a flat, this is limited. For safety, and because it’s impossible to know how far the tyre has been driven while flat, any punctured run flat tyre must be replaced.

Can you mix run flat tyres with standard tyres?

No, run flat tyres shouldn’t be used alongside standard tyres.

Cars designed for run flats have suspension tuned for their weight, so using standard tyres can make the ride feel bouncy and affect handling. You may also lack a spare tyre, leading to costly roadside assistance if a puncture occurs.

Additionally, TPMS may not detect slow punctures with standard tyres, and using them could invalidate your insurance.

Do I need run flat tyres?

If your car doesn’t have a Tyre Pressure Monitoring System (TPMS), it likely doesn’t use run flat tyres.

Run flats have been around since the 1980s and are becoming more common. Check with your manufacturer, you may discover your vehicle already has run flats, meaning that spare tyre in your boot might not be necessary.