Re: [CR]Constructeurs? Tires, NOW Wave of the future

Date: Sun, 13 Nov 2005 14:27:38 -0800
From: Kurt Sperry <>
Subject: Re: [CR]Constructeurs? Tires, NOW Wave of the future
In-Reply-To: <>
References: <> <> wrote:
> A fat tire has an aerodynamic dissadvantage that grows much more
> significant at higher speed.
> Aero can be surprisingly resistant to intuitive analysis. Without hard
> empirical data to support such a conclusion I'd be reluctant to assume th at
> wider tires are necessarily a higher drag solution than narrow ones. In
> straight line conditions the tire is from a head on perspective largely
> sharing the same frontal area as much of the trailing machinery/rider.
> Remember a relatively "fat" fairing on a motorcycle can reduce drag in sp ite
> of an increase in total frontal area by parting the oncoming airflow more
> "gently".

I'm by no means claiming that a fat tire will reduce drag, merely that
> without better knowledge it isn't safe to assume one way or the other.

Kurt Sperry Bellingham WA

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