gearing ?

Old 09-17-2010, 11:55 AM
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Default gearing ?

ok, im running 22/86 on my rustler. if i put in my 76t spur gear, what size pinion would i need to get the same gear ratio?
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Old 09-17-2010, 12:04 PM
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It falls between 19 and 20 (19.44).
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Old 09-17-2010, 01:27 PM
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all you have to do is divide your spur by your pinion, do the same for your 76spur until you come to the closes of the other number.
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Old 09-17-2010, 01:53 PM
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Instead of trial and error, you have the original ratio of 86/22 = 3.909...

To get the same ratio with a known spur, 76/3.909 = 19.44 tooth pinion (round whichever way you want)

To get the same ratio with a known pinion, 21*3.909 = 82 tooth spur
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Old 09-17-2010, 05:36 PM
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ok, thanks for all the help. i ended up using a 21t pinion.
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