Run Flat Tyres Explained: Everything UK Drivers Need to Know
Run flat tyres are standard equipment on millions of UK cars — particularly BMWs, Minis, and many Mercedes models — yet most drivers don’t fully understand what they are, what they can and can’t do, and whether they’re worth keeping or replacing with conventional tyres. This guide explains everything clearly.
What Are Run Flat Tyres?
Run flat tyres (also called RFTs or zero-pressure tyres) are designed to remain driveable after a puncture or total air pressure loss. They achieve this through one of two methods:
- Self-supporting run flats — The most common type. The tyre has reinforced sidewalls that support the vehicle’s weight even with no air pressure. This is what BMW, Mini and Mercedes fit as standard.
- Support ring systems — A rigid ring inside the wheel supports the vehicle if the tyre loses pressure. Less common in mainstream cars.
How Far Can You Drive on a Run Flat Tyre?
After a puncture, most run flat tyres allow you to drive up to 50 miles at a maximum of 50mph. This is enough to reach a tyre centre or garage rather than being stranded at the roadside. The exact limit depends on the manufacturer — always check your vehicle handbook.
Exceeding these limits risks damaging the tyre beyond repair and potentially damaging the wheel. Once a run flat has been driven on with zero pressure, it must be inspected by a professional — it may need replacing even if the puncture itself is repairable.
Can Run Flat Tyres Be Repaired?
Many run flat tyres cannot be repaired after a puncture — particularly if they have been driven on at zero pressure. The internal sidewall reinforcement may be damaged in ways that aren’t visible on the surface. Most tyre manufacturers recommend replacing rather than repairing any run flat that has been driven on deflated.
Some run flats can be repaired if the puncture is in the central tread area, the tyre was not driven on at zero pressure, and the damage is within the repairable zone (typically the central 75% of the tread). Always consult a tyre professional — this is not a DIY repair.
Run Flat vs Standard Tyres: The Key Differences
| Factor | Run Flat Tyres | Standard Tyres |
|---|---|---|
| After puncture | Drive up to 50 miles at 50mph | Must stop immediately |
| Ride comfort | Typically firmer, less forgiving | Generally more comfortable |
| Fuel economy | Slightly worse (heavier construction) | Slightly better |
| Cost | 20–50% more expensive | Lower cost |
| Spare wheel needed? | No (car often has no spare) | Yes (or tyre sealant kit) |
| Repairability | Often cannot be repaired | Usually repairable if damage is minor |
| Availability | Fewer size options | Wider selection |
Can I Replace Run Flat Tyres with Standard Tyres?
Technically yes — but there are important things to check first.
- Does your car have a spare wheel? Most cars fitted with run flats from the factory have no spare wheel or space for one. Switching to standard tyres without a spare leaves you stranded if you puncture.
- Does your car have a TPMS (tyre pressure monitoring system)? If so, it must be maintained and calibrated — this works the same with standard tyres.
- Will it affect your warranty? On a newer car, check with your dealer before switching.
Many UK drivers switch from run flats to standard tyres and find the ride noticeably more comfortable — particularly on BMWs and Minis, where the stiff run flat sidewalls can make the ride feel harsh. If you carry a portable tyre inflator and sealant kit, switching to standard tyres is a reasonable choice.
Best Run Flat Tyre Brands in the UK
Not all brands offer run flat versions of their tyres. The main options available in the UK are:
- Bridgestone DriveGuard — The most widely available run flat in non-BMW sizes. Good ride comfort for an RFT and available in common UK sizes that aren’t BMW-specific.
- Michelin Primacy 4 ST — Michelin’s “Self Seal” technology seals small punctures automatically without the need for run-flat construction. Available in a range of sizes.
- Continental ContiSportContact 5 SSR — Self Supporting Runflat (SSR) range from Continental. Popular BMW replacement option.
- Goodyear EfficientGrip 2 ROF — Runflat (ROF) designation. Good balance of comfort and performance at a more accessible price than premium alternatives.
- Pirelli Cinturato P7 r-f — Run flat variant of Pirelli’s popular touring tyre. Good wet grip ratings.
How Much Do Run Flat Tyres Cost?
Run flat tyres typically cost 20–50% more than equivalent standard tyres. For a common BMW size (225/45 R17 or 225/40 R18), expect to pay:
- Mid-range run flat (Goodyear, Bridgestone DriveGuard): £90–130 per tyre fitted
- Premium run flat (Michelin, Continental, Pirelli): £130–200 per tyre fitted
Frequently Asked Questions
How do I know if I have run flat tyres?
Check the tyre sidewall for markings. Common run flat indicators include: ROF (Run On Flat — Goodyear), SSR (Self Supporting Runflat — Continental), RFT (Run Flat Tyre), ZP (Zero Pressure — Michelin), and RSC (Run Flat System Component — Bridgestone). Your vehicle handbook will also confirm whether your car was fitted with run flats.
Can I drive normally on run flat tyres?
Yes — run flat tyres drive exactly like standard tyres under normal conditions. The only difference you might notice is a slightly firmer ride, particularly on cars with sportier suspension setups. The run flat capability only activates if you lose air pressure.
Do run flat tyres need a TPMS?
Yes — because a deflated run flat tyre feels similar to drive as an inflated one, you may not notice a puncture without a warning system. Cars fitted with run flats as standard always include a TPMS (tyre pressure monitoring system) to alert you when pressure drops. Never remove or disable the TPMS if you’re running run flat tyres.