[Shotimes] Questions about wheel diameter effect on fuel economy and acceleration

[Ron Nottingham]

The wider tire will lead to lower fuel efficiency due mostly to more
friction and more aerodynamic drag due to a larger frontal section.

Ron N. - Dalton, GA
90 SHO
89 325i
(OO==00==OO)
"It takes a man to suffer ignorance and smile"


----- Original Message ----- 
From: "Paul L Fisher" <sho@paul-fisher.com>
To: <v8sho@v8sho.com>; <shotimes@autox.team.net>
Sent: Friday, May 07, 2004 5:15 PM
Subject: [Shotimes] Questions about wheel diameter effect on fuel economy
and acceleration


> I did not mark this OT since this discussion is applicable to SHO's as
well.
>
> Let's say my came stock with 195/65-15 wheels. Let's also say that a
> different trim level comes from the factory with 225/45-17, which have the
> same circumference (revs per mile).
>
> What would be your expectation as to affect on MPG and 0-60 times?
Numerous
> people on the TDI list are saying that my dog slow TDI will become doggier
> and my MPG will drop 10%. I understand the whole rotating mass thing but
> wouldn't the increase in rim diameter (and mass) be offset by the decrease
> of mass of the tire?
>
> Paul L Fisher
>
> 1999 Ford Taurus SHO TR 65K - Stock. Kirk'ed.
>
> Visit my website: http://www.paul-fisher.com
> SHOClub Member: http://www.shoclub.com
> Amsoil dealer: http://www.paul-fisher.com/oil
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