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Which Rev Per Mile For Stock Goodyear F1 285/40/18


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When I received my Lund tune my speedo error was messed up. I can now change the parameters for that in the tune.


When my speedo reads 100 km per hour it is actually 108. It needs to be the other way around. 105 on speedo in real about 100. That saves me speeding tickets. It is now set at 750 revs per mile. Which way do I have to set the new number? Lower or higher to correct this? Who can explain?

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