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However, you cannot run such tyres indefinitely. Check the manufacturer’s specifications to find out how fast and how far you can drive with your specific run-flat tyres. Bridgestone run-flat allows one to continually drive for up to 80 km with the maximum speed of 80 km/h after partial or even full loss of pressure. How do run-flat tyres work? There are two main types of run-flat tyres: with and without support rings. The majority of tyres without the support ring are fitted with a reinforced sidewall that continues to support the car in the case of loss of pressure. This design allows one to continue driving after losing the air pressure, observing the speed and distance stated by the manufacturer. RFT support ring system The support ring system features a ring made of hard rubber or another material that is able to support the weight of the vehicle if the tyre loses pressure. As the tyres continue working even after losing air, all run-flat tyres, regardless of the type of system used, can only be used in vehicles equipped with a tyre pressure monitoring system (TPMS). TPMS warns the driver when any of the tyres lose pressure. Without this system, you may not notice you are running on a flat tyre. ADVANTAGES OF RUN-FLAT TYRES No need to change the tyre in hazardous or uncomfortable circumstances. This, probably, is the key advantage of run-flat tyres and the reason why this type of tyre was invented. With ordinary tyres, you need to immediately replace the flat tyre or call breakdown assistance. In the case of a puncture, run-flat tyres are much more stable than ordinary tyres. They are great at supporting the vehicle even when completely deflated. Run-flat tyres help maintain control of the vehicle in the case of full deflation better than ordinary tyres. Consumers pay increased attention to safety when choosing their vehicle, therefore it can be expected that run-flat tyres will become increasingly popular. Since run-flat tyres work reliably with associated technologies such as TPMS, it is only a matter of time until they become the norm rather than an exception in new cars.