Run Flat Tyres

image: Buy runflat car tyres

Run flat tyres

are tyres that can be driven on without air. Having a puncture on the motorway and having to pull over on to the hard shoulder waiting for a recovery vehicle can become a safety issue. Run Flat Tyres RFT over comes this problem with a special inner reinforcement to the sidewall of the tyre which allows it to be driven on flat at a reduced speed of 50mph for a maximum distance of 50 miles, allowing you the chance to find a garage or a safe place to stop. The on board computer in your car alerts you that there is a problem with the tyre pressures allowing you time to check them out.

Vehicles fitted with Run Flat Tyres do not usually carry a jack, wheel brace or spare tyre.

Many tyre manufactures have different abbreviations for Run Flat tyres.


Image: runflat car tyres

• Continental use SSR self supporting runflat tyres

• Dunlop use DSST Dunlop self supporting tyre.

• Goodyear uses EMT Extended mobility tyre.

• Bridgestone uses RFT Run Flat Tyre.

• Pirelli use Euforia.



All are of equal use that they can be driven with little or no pressure.

Continental also use self sealing tyres for alot of top spec VW& Passats, these are similar to Run Flat Tyres but you also have a spare tyre.



ContiSeal tyres contain an innovative new technology which seals punctures in the tread area of the tyre.

ContiSeal tyres contain a pre-applied, sticky, viscous layer that covers the inside of the tread from shoulder to shoulder.
It provides an almost instantaneous seal around penetrating objects, such as nails and other objects up to 5mm in diameter in the tread area, trapping the air inside and removing the need for emergency roadside tyre changes.
Even if the penetrating object becomes dislodged, ContiSeal will seal the hole and prevent air loss.

ContiSeal tyres are instantly recognisable by the nail symbol on the sidewall and are compatible with all commonly available wheel rims.


BENEFITS

• No need for roadside tyre changes

• Reduced risk of flat tyres

• Holes remain sealed even if puncturing object becomes dislodged

• Driving performance equal to non-Contiseal tyres

Note:
The layer inside the tyres is not designed or intended to act as a permanent puncture repair and while ContiSeal tyres significantly reduce the incidence of flat tyres, unlike runflat tyres they are not designed to be driven under-inflated or in a flat condition.
As with any tyre, motorists with ContiSeal tyres should regularly inspect their tyres for evidence of cuts, punctures and loss of inflation pressure. ContiSeal tyres with cuts or punctures must be inspected by a trained tyre specialist as soon as possible, who will determine whether a permanent repair can be made or whether the tyre must be removed from service.

Run flat tyres

Fitting standard tyres to a vehicle Originally Equipped with Run Flat Tyres is not recommended, as this will affect the vehicles handling performance. However, it is physically possible to replace Self supporting tyres with standard tyres. If such a change is being considered, we recommend consultation with the vehicle manufacturer; tyre manufacturer and insurance company as well as being aware that you will lose any continued mobility in the event of tyre deflation.

Fitting Standard tyres to RFT-equipped cars would remove the run-flat capability, potentially leaving the driver immobile in a case of deflation and could compromise vehicle handling.

Run flat tyres and non-run flats must not be mixed on a vehicle.

It is therefore recommended to consult with the vehicle manufacturer or tyre manufacturer before replacing RFTs with the convention tyres.

As you are aware, the main benefit of a run-flat tyre is that the vehicle can be driven safely for a short distance following a puncture, allowing you to reach a tyre repair centre.

By choosing to remove the run-flat tyres, you must be aware that you will no longer be able to do this, and will need to carry a spare wheel or temporary tyre sealant.


REPAIR

There are conflicting messages between the tyre industry, vehicle manufacturers and tyre manufacturers regarding the reparability of run flat tyres. Tyre repairers do not repair Run Flat Tyres due to the fact that it is unsure how long that the tyre has been driven with low pressure and that possible damage could have occurred to the tyre sidewall. Then it is not possible to safely repair. image: runflat car tyres

It appears that most vehicle handbooks do NOT recommend the repair of run flats and the rest of the industry appear unable to provide a conclusive answer on the subject.

When one or more tyre is deflated or if you are towing and have a deflation it is recommended to stop driving immediately. Take care driving on snow with a deflated RFT as handling may be affected. If chains are to be used with RFT make sure they are a type with automatic adjusters.

Run flat tyres



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