how far off is my speedometer

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Mar 14, 2007 | 12:26 PM

Trickedout420

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Joined: Aug 2006

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how far off is my speedometer

my truck originally came with 235-75-r15 and i put 265-75-r15 how far off do you think my speedometer is

Mar 14, 2007 | 12:32 PM

FrontRangeF150

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Joined: Sep 2006

Posts: 65

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From: Longmont, Colorado

When your speedometer says 60, you are really going 63.7mph. <a href="http://www.miata.net/garage/tirecalc.html">Here is a link to a tire size calculator</a> that you can enter the origional size and a new size and it tells you how far off your speedometer is.