Badger555

Running a 2001 4x4, 6sp HO with edge juice, ex & intake, faas, with 315,R17/70 tires (from a fake hummer pile) basically, from stock, the increased tire size (not so big I thought) dramatically dropped my MPG from 16 to 13/14 MPG.

Since I added my mods, seems I am back to 16.5 again, Nice!!! Just added a Smarty to the line up so can I expect a drop once again? What kind of Mileage are you guys getting?

wcbcruzer

Take the wheels off then imagine what your mileage will be.

Big Blue24

Did you factor in that your odometer is now off by 11% so 12 to 13 really equals 13.32 - 14.43 MPG. Factor in the added friction from more aggressive tread and rolling resistence due to larger diameter, you are right on. Wider wheels help due to the fact that you can run higher pressure in those big tires without bulging the center of the tread and causing uneven wear.