285s or 315s for fuel mileage? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 2 (permalink) Old 02-07-2012, 10:57 AM Thread Starter
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285s or 315s for fuel mileage?

What do you guys think? Would I be better off with a 285/75/16 or a 315/75/16 for fuel mileage? 97 f350 cclb with 4.10 gears running 35s now but time for new tires let me know your input thanks


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post #2 of 2 (permalink) Old 02-07-2012, 12:54 PM
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You'll lose about 5.5" of circumference by going 285, but it is a narrower tire which means less rolling resistance. I would say stay with 315 since you have 4.10 gears though. Lower rpm's add up over the long run.

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