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Added: 07 February 2018
Almost 40% of cars could be running on at least one tyre that is ‘dangerously’ or ‘very dangerously’ under-inflated.
The estimate comes from an inspection organised by Michelin of more than 500 vehicles in Tesco car parks around the UK. It found that 28% of cars had at least one dangerous tyre, and a further 12% had at least one very dangerous tyre.
Michelin classifies tyres that are between 7psi and 14psi below the manufacturer’s recommendation as ‘dangerously under-inflated’, while 14 psi or more under-inflation is deemed to be ‘very dangerous’.
“Driving around on under-inflated tyres costs money and can also cost lives,” Jamie McWhir, Technical Manager for Michelin in the UK, said. He added that checking tyre pressures regularly “makes sense from a cost and environmental point of view, but more importantly it’s critical for the safety of the vehicle, its passengers, other road users and pedestrians.”
Running a car with tyres under-inflated by 7psi decreases fuel efficiency by about one mile per gallon, according to Michelin.