37" tires

[Cougar464]

Has anyone installed 37" tires with the 6.4 hemi and 4:10 gears? If so how much did it affect gas mileage?

 

[ClawSS]

About 2pts down...12.7-13.8 unloaded mixed driving. City will kill the mpg...keep it highway and 14+ is doable.
I have not towed or hauled anything for that type of comparison.

 

[BadKarma]

I get 10-12 mpg on 35’s

 

[ironmike]

I'm getting 14.5 mpg on 37's w 3.73's, 2020 3500 4X, Cummins HO aisin, town driving....