RunOnFlat Keeps rolling when flat
Definition
The Goodyear RunOnFlat tyre is a tyre with a remarkable extra feature: if needed, it can operate for at least 50 miles at up to 50 mph at very low or zero inflation. So even with a total loss of air pressure, the RunOnFlat tyre lets the driver continue driving to a safe place where the tyre can be examined.
In fact, the RunOnFlat system performs so well without air that a tyre PRESSURE MONITORING SYSTEM (TPMS) is a necessary part of the tyre package to alert the driver if a tyre has lost inflation. A "FLAT TYRE" warning will appear on the TPMS if the inflation pressure of any tyre drops below the flat tyre preset warning pressure. See the vehicle's manual for information on this system.
Tyre Fitment
Goodyear/Dunlop strongly recommend fitting RunOnFlat tyres only on vehicles for which the car manufacturer has given approval.
Maximum speed and distance at low air pressure
Although the RunOnFlat tyre has been designed to give at least 50 miles of service at sustained speeds of up to 50 mph at low or zero air pressure, after such extreme usage the tyre may have to be replaced. To help prolong tyre life we recommend keeping your speed as much below 50 mph as possible and to drive fewer than 50 miles. This will increase the probability of being able to repair the tyre.
Note: For some vehicles the tyre's RunOnFlat potential may extend beyond the 50 miles / 50 mph standard. This extended potential mileage only applies when used in combination with the vehicle indicated, and of course provided that a TPMS is operational. The vehicle's owner manual always prevails over this policy.
Maintenance of RunOnFlat tyres
As for any other tyre, the tyre pressure should be checked and corrected on a regular basis by the vehicle's owner.
Damage inspection, mounting / dismounting and tyre repair or replacement should only be done by a tyre or car dealer.
Tyre inflation
Underinflation is the leading cause of tyre failure. It reduces tyre load capacity and allows excessive sidewall flexing, resulting in high heat generation. Maintaining proper inflation is the single most important thing that the tyre owner can do to ensure tyre durability and maximum tread life. Pressure checks should be made when the tyres are cold. The recommended inflation pressure of the RunOnFlat tyre is indicated in the vehicle's owner manual.
Speed rating
The Goodyear/Dunlop RunOnFlat tyres fitted on a vehicle must carry a minimum speed rating as shown in the vehicle documents. Any RunOnFlat tyre must be replaced with a RunOnFlat tyre of identical type, size and speed rating.
Tyre treadwear
Legal rules for tyre treadwear in a country apply to RunOnFlat tires.
"Low / flat tyre" warning indicator
If the "flat tyre" warning appears on the TPMS then it is important to determine the cause of this as soon as convenient. The driver should check the inflation pressure on all tyres, and if any are below the vehicle's manual recommendation then inflation pressure should be corrected. If the "flat tyre" warning appears again then a visit to a tyre or car dealer to have the system inspected should be made. Due to the design of the tyre, the driver will probably not feel a major difference in the ride when the tyre is deflated. But under the low or zero inflation conditions being indicated by the TPMS, he should limit his speed to no more than 50 mph, and avoid hard cornering and severe handling manoeuvres.
