MPG loss with big tires

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11-27-2006, 09:38 AM

KLUMB15

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MPG loss with big tires

I want to put some 35x12.5 MT's on my new truck, what kind of MPG losses are you guys seeing? are they drastic? Do 33's get better gas mileage than 35's, or doesn't it really matter?

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11-27-2006, 09:47 AM

supercrewser13

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What rear end gears do you have. what size engine

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11-27-2006, 10:02 AM

BalogUK

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Quote:

Originally Posted by KLUMB15

I want to put some 35x12.5 MT's on my new truck, what kind of MPG losses are you guys seeing? are they drastic? Do 33's get better gas mileage than 35's, or doesn't it really matter?

i lost about 1.7mpg with my 33's, and a total of 2 mpg with my 35's
15-16 highway, 10-12 city with 35's 3.73LS 3v V8

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11-29-2006, 11:08 PM

FordTruckX2

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I lost approx 2 MPG since I went with my 33" BFG AT KO's along with an added 6" lift on my 2WD.

3.55's, 5.4L, 2WD, Screw. I know, my gears are stretching it a bit.

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11-30-2006, 08:47 AM

Dog'em

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I've got the 5.4 with a 373 rear and lost 1 mpg on the highway and a couple around town, if I had a programmer I think I could probably get that back.