Frequently Asked Tyre Questions
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Questions customers ask about run flat tyres.

We really are different – we genuinely want to help you order your tyres as quickly and easily as possible so if you can’t find the answer to your question here then we’d love to hear from you.

 


    What is a Run Flat Tyre

    A Run Flat Tyre is exactly what it’s name implies – it allows your vehicle to run safely when a tyre becomes flat. This means you do not have to carry out immediate and often dangerous road side tyre changes.

    Run Flat Tyres (RFTs) can also be known as Self Supporting Run Flat Tyres (SSRs). These are specially designed tyres which continue to perform safely for a short time even after they sustain a puncture.

    The chance of tyre blow outs are also dramatically decreased due to the runflat tyre’s unique construction.


    What are the benefits of Run Flat Tyres

    Run Flat Tyres are simply the safest option. There have numerous benefits:

    -  They give the driver greater control in emergency conditions 

    -  They allow you to carry on driving safely after the tyre is damaged or punctured

    -  There is a greatly reduced chance of tyre blow outs due to the unique construction   of run flat tyres

    -  If your car has Run flat tyres you will never have to carry out road side tyre changes again

    -  Your journey does not have to stop if you have a puncture as the runflat tyre will remain safe to drive on

    -  There is no need to carry a spare tyre or tyre changing equipment 

     

    How do Run Flat Tyres work

    Run flat tyres are able to sustain punctures and damage as they have reinforced sidewalls. 

    In ordinary tyres your vehicle is supported by the air in your tyres so when a tyre is punctured the tyre deflates and can no longer be driven on.

    Instead of air - run flat tyres have strong rubber inserts which hold the weight of your car temporarily even after a puncture.


    What is an SSR

    SSR stands for Self Supporting Run Flat Tyre - some tyre manufacturers call their Run Flat tyres SSRs

    How can I find out if my car has Run Flat Tyres

    All Run Flat Tyres have a symbol on the side wall which depicts a tyre with a puncture that continues to drive. 

    There could also be a mark on your tyre's side wall which is a circle with the letters RSC - which means 'Run System Component' This is most often found on BMWs.


    What do different tyre manufacturers call their Run Flat Tyres

    Tyre manufacturers sometimes use different names or initials to describe their run flat tyres as follows:

    Bridgestone - RFT (Run Flat Tyre)

    Dunlop - DSST (Dunlop Self-Supporting Technology) or ROF (Run-On-Flat) 

    Firestone - RFT (Run Flat Tyre)

    Goodyear - EMT (Extended Mobility Technology) or ROF (Run-On-Flat)

    Kumho - XRP (Extended Run Flat Technology)

    Michelin - ZP (Zero Pressure) 

    Pirelli - RFT (Run Flat Tyre)

    Yokohama - RFT or ZPS (Zero Pressure System).

    Can I swap my conventional tyres for Run Flat Tyres

    Run Flat Tyres can only be fitted to cars that have a Tyre Pressure Monitoring System (TPMS). The purpose of a TPMS is to alert the driver if a tyre suffers damage. It can often be the case that if a Run Flat Tyre sustains a puncture the driver will not be aware unless the TPMS alerts them to the problem. Unlike conventional tyres there may be no difference to the way the vehicle handles whatsoever so unless the driver is alerted then they may drive for longer than is recommended or at higher speeds than would be safe on a damaged RFT. 

    If you wish to replace your conventional tyres with Run Flat Tyres we recommend you contact your car manufacturer to check the suitability of the vehicle for run flat technology.

    Can I swap my Run Flat Tyres for conventional tyres

    When a car is fitted with Run Flat Tyres by the manufacturer then the entire vehicle is set up to fit this technology. The handling of the car is determined by the way it's braking and suspension are set so if the car has been originally equipped with Run Flat tyres then these characteristics may well change if conventional tyres are fitted to the vehicle.  

    It is possible to change from Run Flat Tyres to conventional tyres however we would strongly recommend you contact your vehicle manufacturer should you wish to make this change as your car will most certainly not handle the same and the drive will feel incredibly different.

    It's also worth remembering that if you change from Run Flat Tyres you will need to buy a spare tyre and tyre changing equipment. It is highly likely your car will not have built in space for a spare tyre so your spare will take up much needed boots space too. 

    Can I mix Run Flat Tyres with conventional tyres on my car

    We strongly recommend that you do not mix standard and Run Flat Tyres on your vehicle. If one of your Run Flat Tyres needs to be replaced you should not replace it with a conventional tyre because the vehicle handling will be seriously affected.

    How far can I safely drive with a punctured Run Flat Tyre

    The general consensus between tyre manufacturers is that you can drive safely on a punctured or damaged Run Flat Tyre for around 50 miles. This gives you plenty of time to get to your nearest garage or reach your destination safely. The exact distance however depends on many aspects such as the speed you are driving, the road conditions, the weight of your vehicle and so on.

    How fast can I drive with a damaged or punctured Run Flat Tyre

    This depends on many factors such as road conditions, how heavy your vehicle is and how far you will be travelling. As a general recommendation however you should not drive over 50mph once you have been alerted by your Tyre Pressure Monitoring System (TPMS) that your Run Flat Tyre has sustained damage of any kind. It is important to mention here that some tyre manufacturers state that you should not drive over 30 mph once your Run Flat Tyre has sustained damage. You should aim to get your Run Flat Tyre changed as soon as possible once damage has occurred.

    Can I use nitrogen to inflate a Run Flat Tyre

    Yes, absolutely! Nitrogen inflation is fully compatible with Run Flat Tyres.

    My car has Run Flat Tyres - why don't I need a spare tyre

    Because you have Run Flat Tyres fitted to your vehicle you do not need to carry a spare or tyre repair equipment as you will never have to change a tyre yourself. Run Flat Technology enables you to drive safely to your destination even after your tyre has sustained damage or a puncture (providing you do not drive over 50mph or 50 miles). 



    Can I repair a Run Flat Tyre

    Run Flat Tyres should always be replaced and not repaired as it's impossible to tell how the tyre has been handled since the damage occurred. If the damaged tyre has been driven on in a deflated state then the strength of the tyre may have been compromised causing it to be unsafe.

    Can I mix brands of Run Flat Tyres

    We always recommend that when changing tyres you try to match them across the axles of the vehicle. In other words your front tyres should match and your rear tyres should match, however these can be different brands. All tyres have varied handling characteristics and as such although the tyres may be the correct size, load and speed index they may cause your drive to be less stable. 

    Will my car handle differently if I drive with a damaged Run Flat Tyre

    You should notice very little difference in the handling of your vehicle once your Run Flat Tyre has suffered damage providing you drive within the recommended parameters (50mph or 50 miles). A Run Flat Tyre should always be replaced as soon as possible and should never be repaired. 

    Can I use Run Flat Tyres on my caravan or trailer

    Run Flat tyres can only be fitted to vehicles with Tyre Pressure Monitoring Systems (TPMS). Caravans and trailers do not have TPMS technology therefore are not suitable for Run Flat Tyres.

    How Can I contact RunFlatTyres.com

    If you'd prefer to drop us an email you can reach us at helpdesk@runflattyres.com 

    We'd love to hear from you anytime



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