What is Run Flat Technology?
Run Flat Tyres (RFT) are specially designed tyres with reinforced sidewalls that allow you to continue driving even after a puncture. Unlike regular tyres that go completely flat, RFT tyres maintain their shape and can support the vehicle weight without air pressure.
Sidewall marking
Dashboard warning
How do Run Flat Tyres work?
Run Flat tyres use reinforced sidewalls made from heat-resistant rubber compounds. These sidewalls are significantly thicker and stiffer than standard tyres, allowing them to support the vehicle even when air pressure is lost.
Different manufacturer markings
Each tyre manufacturer uses different codes for Run Flat technology:
| Manufacturer | Marking |
|---|---|
| Michelin | ZP, EMT |
| Continental | SSR |
| Bridgestone | RFT, ROF |
| Goodyear | ROF, EMT |
| Dunlop | DSST, ROF |
| Pirelli | r-f, Run Flat |
| Hankook | HRS |
| Yokohama | ZPS |
Distance and speed limits
After a puncture, Run Flat tyres allow you to drive:
- Up to 80 km (50 miles) distance
- Maximum 80 km/h (50 mph) speed
Important warnings
TPMS Required: Run Flat tyres can ONLY be used on vehicles equipped with a Tyre Pressure Monitoring System (TPMS). Without TPMS, you might not notice a puncture. This symbol appears on your dashboard when tyre pressure is low.
Never mix: Self-supporting run-flat tyres must never be mixed with standard tyres on any vehicle.
Retrofitting not recommended: All major tyre manufacturers recommend against fitting run-flat tyres to vehicles not originally designed for them.
Advantages
- No need to change tyres in dangerous conditions
- Better stability during a blowout
- No spare tyre needed - more trunk space
Disadvantages
- Stiffer ride quality
- Higher price than regular tyres
- Cannot be repaired after driving flat
