Many of us are well aware of the problems associated with under-inflated tyres, but what about if they are over-inflated?
This is the question posed in an interesting little feature written by Sarah Tooze for Fleet News.
The fact is, over-inflated tyres can cause heavy wear in the centre of the tread and not on the shoulders. This is dangerous because it reduces the size of the tyres contact patch with the road and can dramatically reduce the grip your tyres have on the roads.
Sarah went on to write: “I was reminded of this when I checked the tyres on our Mazda2 long-termer.
“Being a brand new car I didn’t expect to come across any problems but the tyre pressure gauge showed that the tyres were over-inflated.
“According to the manual, the front tyres should be inflated to 35psi and the rears to 41psi.
“With up to three people it changes to 32psi and 29psi. But I discovered that each tyre was at 40psi.
“Warm tyres can give a higher tyre pressure reading (research from the IAM Trust suggests driving to a filling station could increase tyre pressures by up to 15%) but I had only driven a few yards to a nearby garage.
“Could this have caused an inaccurate reading?
“It shows the need for drivers to check tyres when they are cold. The IAM advises buying a digital gauge and a 12-volt air pump.”
Katherine Clarkson, National Accounts