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Date:         Sat, 15 Oct 2011 17:44:21 -0600
Reply-To:     Robert Stevens <mtbiker62@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Robert Stevens <mtbiker62@GMAIL.COM>
Subject:      Re: Tire vs mph difference
Comments: To: ladros@COX.NET
In-Reply-To:  <4.2.0.58.20111015180828.02727c68@pop.east.cox.net>
Content-Type: text/plain; charset=us-ascii


On Oct 15, 2011, at 4:10 PM, Jason Orr wrote:


> Can someone tell me if my speedometer is off much since I put 245 60 14
> tires on my stock rims? I wanted better handling and it definitely worked
> but I really didnt think about the mph difference. Thanks!!
At an indicated 65MPH, you're actually going 64.8004


I used this calculator:
http://www.paspeedo.com/calculator.htm
Old tire diameter=25.653543307086615
New tire diameter=25.5748031496063


bob ... I think one of the best means of doing this is to have a Scan Gauge
and using a GPS, drive at say, 70MPH, and see what the GPS says ....
it's the way I programmed my Scan Gauge, which I use as my speedometer.
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