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Discussion Starter #1
how many rpms would i be running going 70 with 3.92 gears on a 30 inch tire anyone know?
 

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at the header of the site there is tech page
formulas calculators in there
 

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Discussion Starter #3
hmm maybe i should go 4.10
 

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on 3:92s your speedo will be only 5mph off. you could figure from there.
 
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