How it works?
Goodyear’s new RunOnFlat technology is based on the concept of reinforced sidewalls inside the tyre. When a standard tyre deflates, it simply collapses under the weight of the car, allowing the beads to come off the rim and the sidewalls to be squashed onto the road. The pressure totally destroys the tyre within a few miles. The reinforced sidewalls in Goodyear’s RunOnFlat tyres keep the tyre on the rim and succeed in carrying the weight of the car for up to 50 miles after a puncture with complete air pressure loss.
Tyre Pressure Monitoring System
Since your tyres will simply keep going after they’ve suffered pressure loss, RunOnFlat technology requires the presence of an on-board TPMS (Tyre Pressure Monitoring System) that lets you know that your tyre requires servicing. Without such a system, you would have no way of knowing that your tyre had suffered a puncture or a blow-out.
As a cutting-edge technology, RunOnFlat is still undergoing heavy development. While the basic system, consisting of reinforced tyres together with a TPMS system, has been developed, tested and is now commercially available, there are more technical innovations and enhancements that are just around the corner. In the near future, as soon as your car’s TPMS system tells you that your tyre needs servicing, the nearest licensed service station will be automatically alerted through your car’s GPS system, giving you directions to a site where qualified personnel will be awaiting your arrival, ready and able to get you on your way again as soon as possible.
TPMS stands for Tyre Pressure Monitoring System, an advanced tyre monitoring system that is recommended for all cars, but an absolute requirement for RunOnFlat tyres. After all, without an on-board monitoring system for RunOnFlat tyres, you wouldn’t even know that you’d had a puncture and your tyre required servicing. That is why RunOnFlat tyres should only be fitted on cars that carries a TPMS system.
Indirect or direct TPMS
There are two different kinds of TPMS system: indirect TPMS systems do not measure air pressure directly from the tyre, but calculate it on the basis of ABS/ESP signals. As there is no need for additional sensors, this solution is highly cost-effective while providing a basic and functional monitoring system. The disadvantage is that the system isn’t very accurate. Direct systems employ sensors on the tyre valves that transmit a radio signal to the car’s bodywork. This highly accurate and reliable system also keeps track of tyre temperatures while giving you the most detailed information on your tyres’ air pressure.