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

 

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?

 

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

 

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.

 

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.

 

X2

 

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.