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Aug 13, 2012 | 05:53 PM

#16

Sailor Roy

FTE Chapter Leader

Joined: Sep 2011

Posts: 63,156

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From: Great Falls, Montana

2011 F-350 6.7...... I live in Montana. Up & down hills some "sorta" level. & then the Rocky Mountains.

Great Falls to Ft Shaw & return little to no wind (Almost never here).
65 mph 3/4th of the way and 70 mph for 1/4th of the way.
20.1 mpg. easy on the acceleration.

I have noticed a big difference between 65mph and 75mph.

I also notice a big difference between No wind and 15mph head wind.

Town driving....13-15, but I am not very easy on the go pedal.

Roy

Aug 13, 2012 | 05:56 PM

#17

gsxr1300

Posting Guru

Joined: Aug 2009

Posts: 972

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Can someone measure their 18" tires? My 20's are 34 1/2
I was told the 20's are taller thats why you cant get the 3:31 with 20's

Aug 14, 2012 | 08:36 PM

#18

Baja16

Senior User

Joined: Dec 2008

Posts: 163

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On my truck the factory tires on the 18'' wheels were 275/70 R18's, which if i remember right were approx 33.?'' in diameter. The 295/70 R18 Nitto's i have on the truck now are approx 34.5'' in diameter...