You can't recal the speedo on the 17's. Plus factory tires are 34's and going to 35's wouldn't make a noticeable difference in the speedometer. I've owned all three brands and this is my first ford. Never had this big of a drop in mileage. Luck of the draw I suppose
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Factory setup I was getting right at 19 mpg. 4" lift with 35's and my mileage dropped to 12mpg. A friend of mine has the identical truck and his mileage dropped to 15mpg. I was expecting a drop to 15mpg but not 12mpg. Anyone else have a severe drop in mileage going to 35's?
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