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Anyone noted the MPG difference between stock tires/wheels combo and 35" and 37" combo?

SFBayArea

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Wondering what kind of a MPG you guys getting from the 35" tires vs OEM and 37" vs OEM or vs 35"?

Thank you.
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jwilson2899

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For me going to 35’s, I saw no real noticeable difference over the stock 33’s. I did stick with the Falkens when I moved up to 35’s as I’ve been very happy with them on multiple trucks now. I also used the Tazer Mini to fix the speedometer.
 
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Jay Gatsby

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I'm getting 16 with my 35's. I have 900 miles on my JT. I've read that the mileage gets better after 1200-1500 miles, so I'm hoping that's the case. I pulled my stock tires & wheels off immediately, so I have nothing to compare it with.
 

Invictus Off Road

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Stock I was seeing 20 mpg. Move to JK wheels and treadrights 35s and went down to 12-14 mpg. Now with 37s Patagonia's on dirtylifewheels and getting 17. This is with almost no highway. Used a Tazer mini to recalibrate.

MAX TOW W/ 4:10 gears
 

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19 stock, 17 on BFG KO2 285/70s, and then down to 15.5 on 35x12.50 mud tires. All hand calculated, and I saw the same on the JLU and JT both.
 

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SFBayArea

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Stock I was seeing 20 mpg. Move to JK wheels and treadrights 35s and went down to 12-14 mpg. Now with 37s Patagonia's on dirtylifewheels and getting 17. This is with almost no highway. Used a Tazer mini to recalibrate.

MAX TOW W/ 4:10 gears
You are getting 17 mpg on 37" tires? If that is correct then its great. I wonder if anyone has a similar experience.
 

colindo

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Went from Overland 32" to Yokohama Geolandar X-AT 35x12.5 and have seen about a 0.5-1 MPG loss. Mostly commuting on the highway and am getting 19.5-20 mpg now vs 20 - 21 mpg previously.
 
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SFBayArea

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Went from Overland 32" to Yokohama Geolandar X-AT 35x12.5 and have seen about a 0.5-1 MPG loss. Mostly commuting on the highway and am getting 19.5-20 mpg now vs 20 - 21 mpg previously.
That is a great mpg you are getting.
 

DawgBox

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You are getting 17 mpg on 37" tires? If that is correct then its great. I wonder if anyone has a similar experience.
Yep...getting the same...17mpg on 37" with 4.10's (mainly city driving)...we'll see what changes after I change with diffs to 4.88's this weekend.
 
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SFBayArea

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Yep...getting the same...17mpg on 37" with 4.10's (mainly city driving)...we'll see what changes after I change with diffs to 4.88's this weekend.
That is awesome. What tires do you run on?
On my 2010 JK, I was getting 12-14mpg at best on 35 BFGs.
 

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DawgBox

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That is awesome. What tires do you run on?
On my 2010 JK, I was getting 12-14mpg at best on 35 BFGs.
Running Nitto Ridge Grappler which wrap the 17" Black Rhino Armory wheels with a 2.5" TeraFlex lift
 

colindo

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That is a great mpg you are getting.
I have about a 35 mile commute with 30 miles of that driving between 70-75 mph. Weekends it starts to dip a little as it is mostly surface streets but I am normally able to go about a week between fill ups. That matched up well enough with the BMW 328i I traded in. Overall I am very happy with this truck.
 

Jeeperjamie

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Getting 18.4 average on 315 70 17 BFG KO2s. Max tow with 2.5" lift and 1.75" wheel spacers. Was getting close to 21 with the stock wheels, almost all city driving.
 

Invictus Off Road

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You are getting 17 mpg on 37" tires? If that is correct then its great. I wonder if anyone has a similar experience.

Yup! Have the 37s on for a little over 1.5k I now. But I am hardly going over 60.
 

bastage

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I have only put a couple tanks through.. But first tank was factory wheels & only going about 16.5 mpg. 2nd tank was on 315/70r17 (34.4/12.4) KO2's & got about 17.2.. I am not heavy on the skinny pedal but so far the results are better then expected. Take my experience with a grain of salt as its not really broken in yet.
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