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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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