What are the disadvantages of run flat tyres?ĭrivers that took bends at quicker speeds claimed that the car jittered because of the lack of flexibility in the tyre wall. This means drivers can find a convenient place to have their tyres changed without worrying about the far more expensive cost of replacing damaged alloys. Removing the heavy spare wheel and tyre also improves fuel economy.Īlthough they are not impervious to blow outs, the support ring protects BMW’s wheels from making contact with the road.
This means motorway drivers won’t need to immediately pull over or take the risk of changing the tyre themselves. The major reason is that you can continue to drive and maintain control of your car with punctured run flats for about 50 miles at a speed of 50mph. They also have reinforced side walls to ensure that the bead stays in contact with the wheel rim – this often slips away on punctured conventional tyres, creating contact between the rim and the road. Self-supporting tyres - as used on BMWs, contain a lightweight metallic ring to support the car’s weight once a puncture has been made.However, it’s often deemed the less efficient run flat option because it allows air to leave before the sealing layer becomes active. The technology reduces the amount of air lost compared to a standard tyre with a puncture.
Self-healing tyres - created by Continental, automatically seal any puncture.There are two main types of run flat tyres – self-healing and self-supporting. To help BMW owners decide whether to keep theirs, we’ve highlighted the pros and cons. The brand’s collaboration with Bridgestone provided customers with improved fuel economy and a safer method of punctured tyre replacement. In 2009, BMW decided to fit all of its models with run flat tyres as standard. Driving a BMW with Run Flat Tyres – The Good and the Badĭriving a BMW with Run Flat Tyres – The Good and the Bad.
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