What Are Run-Flat Tyres?
Run-flat tyres (sometimes called RFTs or extended mobility tyres) have reinforced sidewalls that can temporarily support the weight of your vehicle even when the tyre has lost all air pressure. This means that when you get a puncture, the tyre doesn't immediately collapse — you can continue driving at reduced speed for a limited distance to reach safety or a repair facility.
They were developed to solve a genuine problem: modern cars increasingly don't come with spare wheels (to save weight, space, and cost), leaving drivers stranded when they get a flat. Run-flats give you a buffer — a window to drive somewhere safe rather than being stuck on the roadside.
How Far Can You Actually Drive?
The standard specification is:
- Maximum speed: 50mph (80 km/h)
- Maximum distance: 50 miles (80 km)
These are maximums, not guarantees. The actual safe distance depends on the tyre, the type of damage, your vehicle weight, road conditions, and temperature. Some manufacturers rate their run-flats for different distances — check your specific tyre's markings.
Critically: you must have a working TPMS system for run-flats to work as intended. Because the reinforced sidewalls don't collapse visibly, you often can't tell by looking that a run-flat is deflated. The TPMS warning light is your only alert. If your TPMS isn't working, you could be driving on a deflated run-flat without knowing — and that's dangerous.
Can Run-Flat Tyres Be Repaired?
This is the question everyone asks, and the answer is: it depends.
Many tyre manufacturers officially say no — run-flats should be replaced, not repaired. The concern is that driving on a deflated run-flat may have damaged the internal structure in ways that aren't visible externally. A tyre that looks fine on the outside could have compromised reinforcement on the inside.
However, in practice:
- If the puncture is in the central tread area (not sidewall or shoulder)
- If the tyre wasn't driven on flat for more than a few miles
- If the internal structure shows no signs of heat damage or deformation
...then a repair may be possible. At TyreBlitz, our technicians will inspect the internal wall thoroughly and give you an honest assessment. We won't repair a tyre that isn't safe, and we won't tell you to replace one that doesn't need it.
The Pros of Run-Flat Tyres
- Safety: You can drive to a safe location after a puncture instead of being stranded on a motorway hard shoulder
- Convenience: No immediate roadside tyre change needed
- Boot space: No spare wheel means more luggage room
- Stability: The reinforced sidewalls maintain some handling during a puncture — less chance of losing control
The Cons — And They're Significant
- Cost: Run-flats are typically 30-50% more expensive than standard tyres
- Ride quality: The reinforced sidewalls are stiffer, which transmits more road noise and harshness into the cabin
- Limited choice: Fewer brands and models available, especially in less common sizes
- Repair limitations: Many shops refuse to repair them at all, meaning you're buying new more often
- The 50-mile limit: If you're more than 50 miles from help when you puncture, you're still stuck
- False security: Drivers assume run-flats will always get them home. They won't always — severe damage or blowouts still leave you stranded
Can You Replace Run-Flats with Standard Tyres?
This is a common question from drivers tired of the cost and ride quality of run-flats. Technically yes, but there are important considerations:
- You should fit all four as standard — don't mix run-flats and standard tyres
- You'll need to carry a spare wheel or emergency kit since you'll no longer have the run-flat safety net
- Your TPMS will still work — in fact, it becomes even more important
- Check your vehicle warranty — some manufacturers void warranty elements if you remove run-flats
What To Do When Your Run-Flat Goes Flat
- Don't panic. The tyre will support the car at reduced speed.
- Slow down to 50mph or below. Don't exceed the rated speed.
- Call TyreBlitz on 0208 079 1031. We can meet you at a safe location with a replacement.
- Drive to a safe, flat area — car park, lay-by, or home if within range.
- Don't drive beyond 50 miles. After that, the internal structure may fail.