How Run-Flat Tyres Work
Run-flat tyres have reinforced sidewalls that support the car's weight even when tyre pressure drops to zero. This allows you to continue driving — typically at up to 50mph for up to 50 miles — after a complete puncture. The vehicle can be driven to a tyre centre rather than stopping at a potentially dangerous location on a busy Newport road or the M4.
The Advantages
The primary benefit is continued mobility after a puncture without needing to change a tyre at the roadside. This is particularly valuable on motorways and at night. Run-flat tyres also allow manufacturers to remove the spare wheel, freeing up boot space and reducing vehicle weight.
The Disadvantages
Run-flat tyres are significantly more expensive than standard equivalents — often double the price. They typically have a harsher ride due to the stiffer sidewall construction. Because you cannot feel pressure loss, a TPMS system is essential — and if it is not working correctly, you may not realise you have a puncture until the tyre is beyond repair. Not all run-flat tyres can be repaired after a puncture; many must be replaced.
Can You Switch Between Run-Flat and Standard?
It is generally possible to replace run-flat tyres with standard tyres on vehicles that were originally fitted with them, provided the vehicle also carries a spare or you are comfortable relying on a roadside assistance service. Newport Mobile Tyres can advise whether the switch is appropriate for your vehicle. Call us on 01633 855 522 for guidance.
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