Why did a mechanic inflate my Fiesta's tyres to above the recommended pressure?

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Why did a mechanic inflate my Fiesta's tyres to above the recommended pressure?

Having had three new 195/45R16 tyres fitted to my 1.6 diesel Fiesta I was interested to find that they had all been inflated to a pressure of 37PSI. The car handbook recommends 33 at the front and 26 at the rear. Is there a reason for the mechanic's choice?

Asked on 21 September 2013 by CP, via email

Answered by Honest John

Fuel economy. The higher the pressure the less rolling resistance. But the 1.6TDCI is far better on the 14-inch wheels with 175/65 R14 Michelin Energy tyres as fitted to the Econetic. The tyres on yours will feel like roller skates.

Tags: fuel economy tyre pressures wheels and tyres

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