37’s on eco diesel, mpg hit?

[99ls1tj]

Any guesses based on experience or not on how much of a mpg hit I would take by going to 37’s on my JTRD? Currently commuting about 90 miles per day, so not wanting too much of a hit.

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[AdrianVall]

Just put 37’s on mine. I put KO2’s, so they’re a light 37. I doubt mileage will take much of a hit. Averaging about 24 before 37’s. I think I’ll be at 23 at the least.

 

[Chance575]

Mine took a 4 mpg hit. 20 mile commute 12 on interstate 8 in town

 

[Unkle Luk]

I am running 37 Toyo RTs and I average ~21mpg, mostly highway driving 55-65mph

 

[TheSolarWizard]

I get about 22.5 combined on 39s.
the biggest hit on mpg comes from how fast you mash the skinny pedal and whether or not your drive faster than about 72.

 

[IOS-XR]

I get about 22.5 combined on 39s.
the biggest hit on mpg comes from how fast you mash the skinny pedal and whether or not your drive faster than about 72.

Totally stock here but pretty much the same. Mileage drops off over 70 as the Jeep is a brick…. Honestly I get better mileage on trips if I don’t granny it. Get up to speed and resume the cruise.

 

[Elpadre101]

20 mpg on 38's, now I'm on 40's and I'm at 17.8 mpg. 37's you'll be fine.

 

[1is2many]

I averaged 26 on a trip from vegas going north for 5.5 hours all hwy.
After Nitto trail grappler 37’s HEAVY AF, I can barely get 17mpg hwy. That’s doing the speed limit at 65. I have much lighter 37’s on order, almost 15lbs lighter these these tank tires. I expect to be back into the 20’s easily.

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