How to Identify Run Flat Tyres: A Complete Guide 2025

Tyres are one of the most important parts of a car. They help the car move, stop, and stay safe on the road. But what happens when a tyre goes flat? Most cars need a spare tyre or roadside help, but run flat tyres solve this problem.

alt text: multiple cars parked on the curb

Run flat tyres allow you to keep driving even after a puncture. This can be a lifesaver in emergencies. But many drivers don’t know if their car has run flat tyres or not. This guide will help you understand how to identify run flat tyres, their benefits, and whether you should switch to them.

What Are Run Flat Tyres?

Run flat tyres are special tyres designed to work even after losing air pressure. They have stronger sidewalls, so they don’t collapse when they get a puncture. This allows you to drive for a limited distance (usually around 50 miles) at a reduced speed (up to 50 mph). There are two main types of flat run tyres. 

The first type is self-supporting tyres. They have reinforced sidewalls that support the car even when there is no air. Secondly, there are tyres with support ring system. These have a hard rubber ring inside the tyre that helps keep the shape after a puncture.

Most modern cars with run flat tyres also have a Tyre Pressure Monitoring System (TPMS). This system alerts you when the tyre loses pressure.

How to Identify Run Flat Tyres

It can be difficult to tell the difference between regular tyres and run flat tyres just by looking. You can ask your mechanic to identify the tyres. However, we are also sharing some easy ways to identify them.

1. Check the Sidewall Markings

Run flat tyres have special markings on the sidewall. Different brands use different codes, but here are some common ones:

• RFT – Run Flat Tyre (Bridgestone)
• ROF – Run On Flat (Goodyear)
• ZP – Zero Pressure (Michelin)
• SSR – Self-Supporting Runflat (Continental)
• EMT – Extended Mobility Tyre (Goodyear, Dunlop)

Look for these markings on the tyre sidewall to confirm if you have flat run tyres.

2. Check the Owner’s Manual

Your car’s manual will tell you if it comes with run flat tyres. Some cars, especially BMWs and MINIs, come with them as standard. 

3. Look for a Spare Tyre

Most cars with run flat tyres do not have a spare tyre. Instead, they rely on the ability of run flats to keep driving after a puncture. If your car does not have a spare tyre, it may have run flats.

4. Check with a Mechanic or Tyre Shop

If you’re still unsure, take your car to a professional. A tyre expert can check and confirm whether your car has flat run tyres. While you are at it, make sure the tyres aren’t uneven. 

alt text: 55 Garage Cafe lounge 

Should You Switch to Run Flat Tyres?

Run flat tyres offer several benefits, but they also come with some drawbacks. One of the biggest advantages is safety. If a regular tyre goes flat, the driver must stop immediately and change it, which can be dangerous, especially on busy roads. With run flat tyres, you can continue driving to a safe location. 

They are also convenient because they eliminate the need for a spare tyre, which saves space in the trunk. Also, they provide better stability after a puncture compared to regular tyres, reducing the risk of losing control. However, run flat tyres tend to have a firmer ride because of their reinforced sidewalls, which some drivers find uncomfortable. 

If you value extra safety and convenience, switching to run flat tyres may be a good idea. However, if you prefer a smoother ride and lower costs, sticking with regular tyres might be the better choice.

Can Run Flat Tyres Be Repaired?

Many people ask: Can run flat tyres be repaired? The answer depends on the damage.

• If the puncture is small and in the tread area, some tyre shops can repair it.
• If the tyre was driven on without air, it might have internal damage and cannot be repaired.
• If the sidewall is damaged, the tyre cannot be repaired and must be replaced.

Always check with a professional before trying to repair a flat run tyre.

Maintaining Run Flat Tyres

• Even though run flat tyres can handle punctures, they still need the right air pressure. Use a tyre gauge or the TPMS system to monitor it.
• Look for cuts, cracks, or unusual wear. Damaged tyres should be checked by a professional.
• Rotate tyres every 5,000 to 7,500 miles. This helps the tyres wear evenly and last longer.
• Even though run flats can drive after a puncture, you should get them replaced or repaired as soon as possible.
• Make sure the wheels are fully aligned all the time. 

Conclusion

Knowing how to identify run flat tyres is important for every driver. You can check for sidewall markings, the owner’s manual, a spare tyre, or ask a mechanic.

Run flat tyres provide safety and convenience, but they also have some downsides. If you are thinking of switching, weigh the pros and cons carefully.

If you already have flat run tyres, take care of them by checking the pressure, rotating them regularly, and avoiding long drives after a puncture.