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Old 10-05-19, 10:01 PM
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MikeyMK
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Join Date: Jul 2014
Location: Milton Keynes, England
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Bikes: 2.6kw GT LTS e-tandem, 250w Voodoo, 250w solar recumbent trike, 3-speed shopper, Merlin ol/skl mtb, 80cc Ellswick

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These calculators only cater for one crank. I have two. I don't use my CS-RK3 hub on the single-pedal tandem, but if i did, i'd have...

3-speeds front crank
2-speeds mid crank
10-speeds cassette
3-speeds hub

I know this'd be 180 gears but i don't know their actual ratios, and it could take some time to work out. I use an e-hub instead of the CS-RK3 but it'd still be nice to calculate the effect of experimenting with the front two cranks, which turn at different speeds.
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