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Old 11-24-2007, 12:03 PM   #3
pearce9906
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Join Date: Nov 2007
Location: OHIO
Posts: 20
Default Re: Speedometer gear recomendation

There is a formula to figure out what gear you need.....

ring gear x speedometer drive gear x tire revolutions per mile / 1000

this will give you the driven gear tooth number
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