I went from 255/55/17 to 275/50/17, almost the same overall dia. I'd say I
lost about .3 to .5 mpg. I assume due to extra rolling resistance, wind
resistance and rotating mass.
Jay W
4.7L Auto Sport+ C.C. 2wd Black
Mods Profile page at
http://www.twistedbits.net/WWWProfile/dakota/Re5X8z5la@Ix2/profile.htm
>Date: Wed, 28 Mar 2001 21:08:27 EST
>From: Puddlestompa@aol.com
>Subject: DML: wide tires
>
>Has anyone put wider tires on their truck and noticed large changes in gas
>mileage, there would also be bigger wheels.
>
---------------
Don't forget with a taller tire you increase your rotating mass. And the
further out the mass is on the wheel the more it affects your
acceraration/milage.
>
> So, is the gas mileage affected? Only if the replacement tire is
>shorter in diameter, not taller in diameter. Being shorter will raise
>the engine rpm at any given speed, increasing fuel consumption.
> Patrick
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