tire size gearing and gas mileage

[XLT_Explorer]

hey all just wondering what you got and what you are getting

here's mine
p235/75r15 3.55 4.0l 4 speed auto 20mpg hiway 12-15 mpg city

i am considering going up to 31's but would like to know if someone has the same setup and can still get relatively reasonable gas mileage, without having to swap in 3.73 gears.

 

[tgertz77]

I wouldnt swap in 3.73s if you were gonna do a gear change go at least 4.10s

I have 3.73s and 31"s and I get on average.. about 14 mpg... this is california 'highway' miles and city.