Run-flat tyres at low prices

What is a run-flat tyre?

A run-flat tyre is designed not to collapse in the event of a puncture. Unlike a standard tyre, which squashes under the weight of the vehicle when pressure is lost, the run-flat tyre retains its structure.

This technology relies on two main systems:

• Self-Supporting System (Reinforced Sidewalls): This is the most widespread technology on the market. The tyre sidewalls are reinforced with ultra-resistant rubber compounds. In the event of air loss, the sidewalls support the weight of the vehicle, preventing the rim from touching the road or the tyre from coming off the rim.
• Support Ring System: Rarer in everyday use, this setup is now mainly reserved for specific vehicles. A rigid insert inside the tyre supports the tread in the event of deflation.

Why choose run-flat tyres?

Choosing this technology is not just about comfort; it is about safety. Here are the three main reasons to choose them:

1. Control: In the event of a puncture, the vehicle remains stable, allowing you to maintain control of your vehicle and avoid an accident.
2. Peace of mind: No need to change a tyre at the roadside or in a hazardous area. You can continue driving to a safe place, a garage, or your home.
3. Savings: This technology removes the need to purchase a spare wheel. Removing the spare wheel and jack reduces overall weight and frees up boot space.

How can you recognise a run-flat tyre?

To find out whether your vehicle is fitted with this technology, simply check the tyre sidewall or check the product page when buying on Grip500.
A run-flat tyre is identified by a specific marking (often a two- or three-letter abbreviation) displayed next to the tyre size.
There is not yet a universal symbol. Each manufacturer uses its own abbreviations. Here is a table to help you identify them:

Can I fit run-flat tyres to my vehicle?

Fitting run-flat tyres requires that your vehicle is technically compatible to ensure your safety and driving comfort. Here are the two key points to check:

• TPMS system: Your vehicle must be equipped with tyre pressure sensors. As run-flat tyres are very rigid, you might not feel a puncture. TPMS sensors will warn you via the dashboard.
• Vehicle suitability: Run-flat tyres are intended for vehicles specifically designed to use them. The chassis, suspension, wheels and driver-assistance systems are set up to accommodate run-flat tyres.

What should you do if a run-flat tyre gets a puncture?

If your pressure warning light comes on:

1. Reduce your speed: Never exceed 80 km/h.
2. Keep your driving smooth: Avoid hard braking and sharp turns.
3. Limit the distance: You have a range of around 80 km.
4. Find a professional: Go promptly to a garage to have the tyre inspected.

Note: These limits (80 km at 80 km/h) are standard values. Always refer to the specific information engraved on your tyre sidewalls or in your vehicle's service book.

Can a run-flat tyre be repaired after a puncture?

No. In almost all cases, a run-flat tyre that has been driven flat or at very low pressure must not be repaired.

When a run-flat tyre is driven flat, its internal structure (the reinforced sidewalls) is subjected to extreme thermal and mechanical stress. Even if the exterior looks fine, the internal structure may be weakened, creating a risk of a future blowout. For safety reasons, most manufacturers require the tyre to be replaced to ensure your safety.

Grip500 advice: Driving on a repaired run-flat tyre means losing all the benefits of this technology. For your safety and that of your passengers, always replace a damaged run-flat tyre.