Run flat tyres have been in use for several years and are fitted to various cars when they leave the factory. Coupled with the Tyre Pressure Management System (TPMS), they aim to reduce the gross weight of cars to lower fuel consumption by removing the spare wheel, tyre, jack, and other tools, making it impossible to remove a wheel even if desired.
However, considering the higher cost of run flat tyres over the car's lifespan, it is uncertain whether this method effectively reduces carbon emissions. The construction of run flat tyres, including the extra strength in the casing, may result in increased emissions during production.
Here are some advantages and disadvantages of run flat tyres:
Advantages
· In the event of a puncture, you can drive for 50 to 100 miles, depending on the tyre, allowing you to reach a garage for repairs.
· The TPMS alerts you to a puncture or slow deflation, enabling timely checks and re-inflation.
· You do not need to change the tyre by the roadside or wait for assistance, which is beneficial for individuals with limited technical ability.
· The tyres are approved by the vehicle manufacturer, ensuring compatibility with the car.
Disadvantages
· Continuing to drive on a punctured run flat tyre can damage the side wall's structural integrity, rendering the tyre unrepairable and necessitating replacement, regardless of tread remaining.
· A blowout or sidewall hole may cause the tyre to go flat, leaving the vehicle undrivable without a spare tyre, requiring recovery assistance.
· Run flat tyres are approximately one-third more expensive than standard tyres, increasing costs if they cannot be repaired and must be replaced.
· The ride comfort is generally firmer due to the stronger build, despite adjustments to suspension setups by car manufacturers.
· They tend to have a shorter lifespan, with previous class action lawsuits addressing the high replacement costs experienced earlier than with standard tyres.
These are some of the pros and cons of run flat tyres. Many motorists choose to fit a spare wheel in the boot alongside a jack and wheel brace, as aftermarket steel wheels gain popularity for those using run flat tyres.
Alternatively, all run flat tyres can be replaced with standard tyres, provided they match in size and ratings. This switch should not affect insurance policies or warranties, but it is advisable to verify with the manufacturer.
Ultimately, the decision comes down to personal preference. Some may opt to keep run flats with an additional spare for emergencies, while others may prefer returning to standard tyres.