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Old 08-12-2004, 06:47 PM
kd5boc kd5boc is offline
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OK..."for dummies" so to speak...

1.) You have to rotate both tires at the same time (for 1 revolution) while you count the driveshaft.
2.) If you hold 1 tire and turn the other one, you must turn it twice to get the ratio...I seriously HOPE you don't have 6's...

By the way...if you want them:

Tire size is it's diameter (in case you didn't know. )

mph x gear ratio x 335 / tire size = rpm
(rpm x tire size) / (mph x 336) = gear ratio

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