Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Lost 8MPG with New Tires!
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Old 10-13-2012, 08:39 PM   #20
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Join Date: Feb 2006
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Location: Garland, TX, TX
What I Drive: 2012, sterling grey, sel sedan

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if you increased the rolling diameter of the tire you will lose mpg. also the tire can change mpg all by its self without even changing the size. I work with tires and have seen it a million times. a hybrid will come in getting 40= mpg and not want to pay for the tires designed for eco cars and want a cheaper tire. well that cheaper tire doesnt have the same rolling resistance and weights several pounds more than the eco tire. i personally switched my stock tires (continental) for a bridgestone turanza with serenity plus which is a low rolling resistance eco tire. i average 41.8 mpg on the hwy now.
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