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Gearing/speed Calculator


redkow97

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Anyone have a good gearing/speed calculator online?

I would prefer one with mechanical ratios AND real-world estimates that factor in powertrain loss, true horsepower, and possibly even rider weight.

(This stems from messing with gearing at PIRC last night on the XR. I am curious how much more I could gear it down before I hit the point of diminishing returns. We logged a GPS verified 48.3 mph with the bike pegged at the rev limiter. I am wondering if 6hp would be capable of 55 or even 60mph with tall enough gearing and enough flat ground. Purely an academic exercise with virtually no real-world application)

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Looking at the gearing commander site, it's calling me a liar...

 

I'm wondering if I need to adjust the wheel size to bring things into a more accurate calculation.  That is the major discrepancy between my bike and JB's bike (I'm running moped tires, and he's running much taller BT-45's)

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