What are run flat tyres?


Run flat tyre with puncture

What is a run flat tyre?

Run flat tyres or self supporting tyres are designed for the purpose of remaining functional for a short while with no air pressure in the tyre. This means if you do suffer a puncture whilst driving, there’s no need for an awkward roadside tyre change, you should be able to drive home safely or to the nearest garage to have your tyre changed. Run flat tyres also reduce the dangers of a tyre blow out due to their unique construction.

In conventional tyres, the vehicle is supported by the air in the tyres, and once you have a puncture it loses the pressure and the tyre collapses. However, a run flat tyre is built with a reinforced sidewall. They are constructed with a tough rubber insert which temporarily holds up the weight of your vehicle, even after a puncture.

How far can you drive on a run flat tyre?

Once a run flat tyre suffers a puncture you should be able to continue driving for around another 50 miles at an average speed of about 30mph. Obviously, the exact range would depend on variables such as, the load of your vehicle and driving conditions.

Endurance of run flat tyres

Run flat tyres and conventional tyres are in most cases constructed using the same compounds, so you can expect them to wear at the same rate. Just like a conventional tyre, a run flat tyre needs the same tyre maintenance, i.e. you need to regularly top up the tyre pressure and check the tread depth.

Can run flat tyres be repaired?

Simple answer, no. Once a run flat tyre has suffered a puncture and been driven on, the internal structure of the tyre could become weakened, and it’s impossible for a fitter to know if the tyre was driven on for longer/faster than recommended after the puncture. So we recommend you replace the tyre.

Asda Tyres are a leading supplier of quality tyres who can provide you with extensive help and advice.

  • What are run flat tyres?
  • What are run flat tyres?

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