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Run Flat Tyres

Run-flat systems have been around for a number of years in many different forms. Over the years tyre manufacturers have adopted several different systems but all with one goal in mind - vehicle safety.

Most motorists will, at one time or another, suffer the inconvenience of a tyre puncture.

There are inherent dangers associated with changing a wheel at the roadside, particularly if the puncture occurs on a freeway where the work has to be carried out on the road shoulder, where possible motorists need to avoid the risk of being stranded.

Whilst a puncture is usually more of an inconvenience and unwanted expense, the dangers involved with a tyre failure at high speed are far more serious - the greatest danger being a complete loss of control of the vehicle. This occurs when the sidewall of the tyre, which is usually kept secure against the wheel by the internal air pressure, becomes separated and drops into the well of the wheel.

Run-flat tyres are designed to keep the all parts of the tyre secure and where they need to be - even when operating at zero pressure.

Run-flat tyre systems can also generally be split into two separate categories - those incorporating a significantly strengthened sidewall, and those that use an internal support ring that is mounted on the inside of the wheel rim.

Both systems will, subject to distance limitations, allow the motorist to continue their journey without having to stop and replace the punctured tyre.

The other essential item of safety equipment for a vehicle with run-flat tyres is a Tyre Pressure Monitoring System (TPMS). Run-flat tyres are designed to minimise the difference in ride quality when a tyre is punctured. This is especially the case with freeway driving where there is relatively little cornering. For this reason it is difficult to determine whether a tyre has lost pressure or is operating in zero pressure conditions. Should the driver not be aware of a loss of pressure they may well exceed the safety limits imposed by the manufacturer.

Rft -2

Rft -1

There are a range of Run Flat Tyres which are deemed not repairable by the tyre manufacturer. If you are unsure, please check with your local T-Mart as to the specific manufacturer recommendations for your Run Flat Tyres.

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