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Date:         Fri, 14 Oct 2011 17:28:10 -0500
Reply-To:     mcneely4@COX.NET
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dave Mcneely <mcneely4@COX.NET>
Subject:      Re: tire circumference
Comments: To: Robert Stevens <mtbiker62@GMAIL.COM>
In-Reply-To:  <5949D574-F0EE-43D6-AA74-36115149D4BD@gmail.com>
Content-Type: text/plain; charset=utf-8


---- Robert Stevens <mtbiker62@GMAIL.COM> wrote:
> On Oct 14, 2011, at 11:39 AM, Rob wrote:
>
> > At  10/14/2011 06:41 AM, Robert Mac Dowell wrote:
> >> Let me rephrase that. How many RPM'S should it be for the speedo to be right
> >
> > I've been using http://www.1010tires.com/tiresizecalculator.asp to
> > see sizes, revs & all that stuff for different sized tires.
>
> For whatever it's worth in this discussion:
>
> Tire Rack stated rpm's for my tires= 715
> 10/10 calculator= 718.4
> Miata.com calculator= 697


And, for whatever it is worth, this calculator gives 810 and a fraction revolutions per mile for the Hankook RA08 (or any other tire) in the 185R14 size, and 790 and a fraction for a 195R14 size.  That's very close, but not exactly the same, as the 809 that the Miata site gave for the 185 tire (the difference is less than 1%).
--
David McNeely
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