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Calibrating the speedometer

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Old Jan 13, 2007 | 11:55 PM
  #1  
in the flesh's Avatar
in the flesh
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Calibrating the speedometer

Getting new rims, I understand if you change your wheels the speedometer needs to be recalibrated.. Where can I do this?
 
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Old Jan 14, 2007 | 04:57 AM
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onasled
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I don't think you can. Anyway, as I remember, Mini speedo's are off anyway. They read higher then actual speed, and even more as speed goes up, as much as 10mph.
 
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Old Jan 14, 2007 | 07:55 AM
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Hound_va
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The speedometer reading is directly related to the rolling diameter of your wheel/tire choice. Plug some numbers into the calculator at the below link and you'll see how the speedometer is affected.

http://www.miata.net/garage/tirecalc.html
 
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