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3.31 open diff with P235 75 17 tires. I'm upgrading my tires to the 265's in about 3-4 months and I expect to see a small decrease in MPG's.
I keep forgetting about your 235/75/17s Tim. That alone gives you at least 1-2mpg over my setup with the 275/55/20s. I do envy your mileage sir, but I have a few creature comforts to distract me.
I keep forgetting about your 235/75/17s Tim. That alone gives you at least 1-2mpg over my setup with the 275/55/20s. I do envy your mileage sir, but I have a few creature comforts to distract me.
If the 235's didn't "look" so small I'd never change them. The change out is purely aesthetic as the smaller tires have handled some amazing weights that I've thrown in the bed.
My co worker just bought a 2014 Plat in white with total black interior. The 20's make the truck look bigger than mine. I can see why these trucks are so popular.
Three trucks all different
My father's XLT with 3.31 elock and 18 inch wheels, 15.3 average
My friends FX2 with 20" wheels and a 3.15 open diff, 17.5
Mine with 22" tires and 3.55 elock 13.5
Of course they are. They have different drivers and are driven in different conditions. You could have three of the exact same truck and still have widely different fuel economy.
I never expected mine to be that low, I don't know if it makes a difference bit my fathers truck feels a lot lighter than mine. Don't know if it is because of the tire size or what, bit I hope it gets better once it gets more miles.
My F250 gets 22 with AT tires and 20" wheels.
but its also a diesel, just because the EcoBoost has Diesel like power, its still a turbo charged gasoline engine, which is not as efficient as a diesel.
The 22's don't help things any either, more unsprung weight, I have a feeling i'll do a little better once i take my factory 22s off and put my 17" snow tires on here in about a month and a half for winter...but winter fuel and warm up time will kill any improvement i might have seen.
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