mpg decrease with larger tires?

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02-16-2014, 11:50 PM

Deedsta

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mpg decrease with larger tires?

I have a 09 ford f150 xlt 5.4l v8 4x4 supercab. i have 265 on it right now but i want to get 315 raptor tires. will this affect my mpg? Also i drive on the highway with it 80% percent of the time. @70mph

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02-17-2014, 12:00 AM

justinh11

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yes it will decrease a good bit going from a 265 to a 315 it a big increase in road contact and a good bit of weight difference

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02-17-2014, 12:17 AM

PawPaw

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Quote:

Originally Posted by Deedsta

I have a 09 ford f150 xlt 5.4l v8 4x4 supercab. i have 265 on it right now but i want to get 315 raptor tires. will this affect my mpg?

Going from a stock 31 or 32 inch tire to almost a 35" will drop you about 2 to 3 mpg on average. I was able to get 16 to 17 mpg on the highway running 315x70x17's on my '04 Lariat with help from an Edge programmer. I had the H2 Hummer tires that were Load range D with 50 psi max and they were not super heavy.

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