What are run-flat tyres?

At a glance:

• What run-flat tyres are: Tyres with reinforced sidewalls that temporarily support your vehicle's weight after a puncture, without immediate deflation
• How far you can drive: Up to 50 miles at 50 mph — enough to reach a garage safely; exact limits vary by tyre brand and vehicle
• TPMS required: Run-flat tyres must be paired with a Tyre Pressure Monitoring System — without it, you won't know you've had a puncture
• Cost: Run-flat tyres typically cost up to 20£-100£ more than equivalent standard tyres
• How to recognize a run-flat tyre: RFT, ROF, ZP, SSR, RSC or DSST on the sidewall

This guide offers general advice; for vehicle-specific guidance, consult your handbook or a qualified technician at your nearest Point S centre.

What does run-flat mean?

Run-flat means exactly what it says: the tyre is built to keep running for a short distance after it
goes flat. Unlike a conventional tyre, whose sidewalls collapse in the event of a puncture, a run-flat tyre's stiffer construction keeps supporting the car's weight. It won't prevent a puncture — debris can still cause damage — but it changes what happens next for the driver.

How do run-flat tyres work?

Air pressure normally supports a tyre and the vehicle. A run-flat tyre uses a reinforced sidewall — self-supporting technology — to take over when pressure drops. Some manufacturers instead fit a support-ring design: a rigid ring inside the tyre or wheel that carries the car's weight once it deflates.

Because a run-flat tyre hides the usual warning signs of a puncture (loss of handling, visible sag), it must always be paired with a functioning TPMS. BMW's system, for instance, is known as RSC — Run-flat System Component — one of several brand-specific labels for the same technology. TPMS is mandatory for all new vehicles since 2014. A TPMS malfunction can cause an MOT failure for all passenger vehicles first used from 1 January 2012 that were fitted with TPMS from the factory. You can book a pre-MOT check to make sure your TPMS system is working properly.

How far can you drive on a run-flat tyre?

Most run-flat tyres are rated for roughly 50 miles at 50 mph (according to UNECE R64 regulation) after losing pressure — but this range and speed limit are always set by the tyre manufacturer and should never be exceeded. Driving further, faster, or ignoring a TPMS warning risks damage to the wheel rim itself, which is a far costlier repair than a new tyre.

Run-flat vs normal tyres: what's the difference?

Choosing between run-flat tyres and normal tyres often comes down to balancing safety and convenience against cost and comfort. While run-flats provide peace of mind in the event of a puncture, conventional tyres remain the best choice for many drivers due to their smoother ride and lower long-term running costs.

Can you mix run-flat and normal tyres?

TyreSafe advises against mixing run-flat and conventional tyres on the same vehicle, as it can compromise handling and stability. Switching a run-flat-equipped car back to regular tyres is possible, but there's often no spare tyre cavity — so a puncture could leave you stranded. Retrofitting run-flats to an older vehicle also needs a working TPMS and, sometimes, suspension adjustments.

Can run-flat tyres be repaired?

Not always. Whether a punctured run-flat tyre can be repaired depends on the tyre manufacturer, the size and location of the damage, and whether the tyre was driven while deflated (which can cause internal, invisible damage to the sidewall). Always have a qualified technician inspect a run-flat tyre after any pressure loss — at Point S UK, our technicians follow manufacturer guidelines before confirming whether repair or replacement is the safer choice.

In the UK, any professional repair must strictly adhere to the British Standard BS AU 159 , which mandates that a tyre must be removed from the wheel and thoroughly inspected internally to ensure the reinforced sidewall hasn't suffered structural separation or heat degradation while driven deflated.

Popular run-flat tyre brands and markings

Because there is no universal industry standard for run-flat coding, each tyre manufacturer uses its own specific set of letters or symbols on the sidewall. Understanding these markings is essential to ensure you are fitting the correct replacement tyres that meet your vehicle's original equipment (OE) specifications. The table below outlines the most common run-flat markings used by major tyre brands and car manufacturers in the UK:

You can learn more about tyre markings in our dedicated guide.

Use our online tyrefinder to find suitable run-flat tyres at your nearest Point S garage. 

Car manufacturer specific (OE) markings

In addition to the tyre brand's own run-flat code, many car manufacturers require specific "homologated" versions of these tyres. These are designed in close coordination between the car and tyre manufacturer to ensure the best choice for the vehicle's handling and suspension characteristics.

• BMW & Mini: Look for a Star symbol (★). Most modern BMWs use RSC (Run-flat System Component) technology.
• Mercedes-Benz: Marked as MOE (Mercedes Original Extended). These are run-flat tyres specifically tuned for Mercedes comfort and safety standards.
• Audi: Often marked with AOE (Audi Original Extended) to signify run-flat properties.
• Alfa Romeo: Uses the AR marking for tyres specifically approved for their performance models.

Please note: While it is sometimes possible to fit a tyre with a different manufacturer’s OE mark, Point S technicians strongly recommend sticking to the specific fitment designed for your vehicle to maintain optimal safety and performance. Ask your nearest Point S centre for advice about your tyre fitment.

Should you choose run-flat tyres?

Deciding whether to stick with run-flat tyres or switch to standard alternatives depends on your vehicle's setup and your personal driving priorities. At Point S, we recommend considering these three key factors:

• Vehicle compatibility: If your car was supplied with run-flat tyres from the factory, we recommended sticking to the original fitment. You can switch to standard tyres, but you must replace all four at once to maintain stability and carry an inflation kit.
• Safety requirements: Run-flat tyres must never be retrofitted to older vehicles without a functional Tyre Pressure Monitoring System (TPMS), as you won’t be alerted to a dangerous loss of pressure.
• Driving priorities: Choose standard tyres if you prioritise a smoother ride and a lower budget; however, stick with run-flats for maximum safety during high-speed motorway or night-time journeys.

Frequently asked questions

Are reinforced tyres the same as run-flats?

No, reinforced tyres (marked XL or RF) and run-flat tyres serve different purposes. Reinforced tyres are engineered with a stronger internal structure to carry heavier loads at higher pressures. Run-flats have specifically stiffened sidewalls designed to support the vehicle’s weight only after a puncture occurs, preventing the tyre from collapsing.

Does my car have run flat tyres?

To identify a run-flat tyre, check the sidewall for manufacturer-specific codes like RFT, ROF, RSC, SSR, or ZP. You can also consult your vehicle handbook or check the boot—if your car was designed for run-flats, it will typically lack a spare wheel and jack kit to save weight.

What is the disadvantage of a run-flat tyre?

Run-flat tyres typically have a harsher ride due to their stiffer construction, which makes them less effective at absorbing road imperfections. They are generally more expensive to buy, often cannot be repaired after a puncture, and can wear out faster or more unevenly if wheel alignment is not perfectly maintained.

Can I replace my run-flat tyres with normal tyres?

Yes, you can replace run-flat tyres with normal tyres, but you must replace all four at once to maintain balanced handling. Be aware that most run-flat-equipped cars lack a spare wheel, so you’ll need an inflation kit. Consult your local Point S experts to ensure your suspension and insurance allow the switch.

How much are run-flat tyres?

Run-flat tyres typically cost £20–£100 more per tyre than standard equivalents. In 2026, expect to pay between £130 and £250+ per tyre for premium brands like Michelin or Goodyear, depending on your vehicle type and wheel size. While the upfront cost is higher, they eliminate the need for a spare tyre.

What is the recommended run-flat tyre pressure?

The recommended pressure for run-flat tyres is identical to the manufacturer’s specification for your specific vehicle. You can find these figures in your owner's manual, on the driver’s door pillar, or inside the fuel cap. Always check pressures when tyres are cold to ensure accurate readings and optimal safety.

Are all season run-flat tyres any good?

Yes, all-season run-flat tyres are an excellent choice for UK drivers seeking year-round safety and convenience. They combine reinforced sidewall technology with a versatile rubber compound that maintains grip in both summer heat and cold, wet winter conditions. However, they typically carry a higher price tag than standard all-season alternatives.

To check availability or compare options for your vehicle, contact your nearest Point S garage here.