Run-flat tyres are becoming more common on the roads today as more car manufacturers fit these tyres as standard equipment or as an optional extra. Run-flat tyres have huge benefits for driver / passengers in terms of safety. For example, if you have a tyre blowout / puncture on the motorway, the tyre stays on the rim allowing the driver to retain full control of the car. The Advantage with Runflat tires is that they can operate without air in them, for a relatively short distance and low speeds, as their basic shape is kept by rigid components. This rigidity helps a driver maintain control of the vehicle if the tyre loses pressure, and removes the need to change a tyre immediately in conventional tyres, the pressurised air contained within the tyre supports the weight of the car. However, recently tyres have been developed which are able to support the weight of the car by themselves, for a short period of time. These are known as Runflat tires.
In everyday operating conditions, Run-flat tyres work like conventional tyres. They still contain air; to reduce the load that the runflat system has to bear, to spread the weight of the vehicle evenly on the road surface, and to maximise the contact patch between the car and the road.