Re: gear ratio
you would change tire height in formula,if you were trying to get that precise,but I don't know how tell how much tire growth would happen, rim/tire width,mph, sidewall etc. would all have to be factored.
I always have just used height on sidewall or mearsured and is close enough,any growth that happens is just a little cushion that keeps you from going over.
I have always geared by this formula IE if want to go through @ 8K gear so I get as close to that # as can.
Mike Taylor 3601
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