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Over inflating tires can slightly increase gas mileage by creating less roll resistence (less tire touching the road). However, there are several downsides. Decreased traction means worse braking and handling, especially on wet pavement. Also, increased air pressure will cause premature and uneven tire wear in the middle of the tire.

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15y ago
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13y ago

No , a properly inflated tire will provide better fuel economy and will be safer .

Under inflation of tires is one of the leading causes of excessive fuel use. With lower air pressure there's a larger (and unnecessary) tire footprint on the road creating more rolling resistance. Under inflation also increases wear and tire heat which can be damaging.

Inflating tires to the pressure recommended by the manufacturer (check owner's manual and/or sticker in the driver doorsill) will give a combination of best ride, best handling and best fuel mileage.

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Q: Does under inflating tires increase fuel economy?
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