MPG change ? from stock 16's to 31's - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 05-11-2010
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MPG change ? from stock 16's to 31's

I am just looking for some insight as to an expected mpg change, specifically from 4.0 OHV owners... I have 16's with bfg long trails but came across a great deal on some 31X10.5 r15 with new BFG at's.... So I am curious to hear from those who have already done this what their MPG change was? PLEASE
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Old 05-11-2010
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Umm.. 16 is a rim size. Can't compare sizes with out knowing what the metric size of the tire on the 16" rim is?
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Old 05-12-2010
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what was the size of the stock tire? Im assuming 245/75/r16 which is like 30.5 inches. You shouldnt really see a difference since 31x10.5 bfgs and 30.7 inches tall. Also do you plan on getting new rims? Cause you will need 15's for a tire with a rim size of 15.
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Old 05-12-2010
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Originally Posted by SnowWheeler View Post
what was the size of the stock tire? Im assuming 245/75/r16 which is like 30.5 inches. You shouldnt really see a difference since 31x10.5 bfgs and 30.7 inches tall. Also do you plan on getting new rims? Cause you will need 15's for a tire with a rim size of 15.
Yes 245/75 R16... Sorr ywas in a hurry when I typed this yesterday had a lot going on at the farm had to get back out to the stable. I am getting a deal on rims/tires just curious with the bfg ats although the same diameter they would have the more aggressive lug and possibly more weight? So I was wondering what kind of an MPG change to expect...

Thank you for the replies
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Old 05-12-2010
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Shouldn't be much change in MPG.
I went from stock 255/70/16 to 31x10.5x15 and there was no noticeable difference in gas mileage.
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Old 05-12-2010
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I had a level II with 31's stock and also a 2001 ORP wit 245/75/16's. Both got exactly the same mileage.
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Old 05-12-2010
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Shouldn't be much change in MPG.
I went from stock 255/70/16 to 31x10.5x15 and there was no noticeable difference in gas mileage.
X2
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Old 05-12-2010
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i am a 4.0 OHV owner and had 31's on my truck for a winter and didnt see much of a difference, a little bit though. i have 235/75/15 as stock tires and didnt need any lift to fit 31's.
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