im looking at buying a truck tomorrow.. i want to put 35s and a leveling kit on it.. if it has 3.55s will it hurt the fool mileage badly?..

 

well if you put bigger tires on any truck it will hurt the gas milage no mater what gears you have. but Im not really sure, I had the 3.55s in my last truck but do to he gearing it lacked something from takeoff. I have th 3.73s now and like it a whole lot better.