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Your problem sounds just like one I just fixed on my bike. Mine sat around unused for several years, then had a problem of slipping when I rode up hill, so sat another year. It slipped under higher load and not during shifting. The chain and sprockets looked fine so I figured it had to do with the freehub being gunked up. While I didn't have the tools to ...


Not really, the one from Nu Vinci is closest but Has manual shift the weight factor is an issue. The major problem in developing is the input power is too low for a fully mechanical system to respond smoothly and if you include electronics it becomes too complex. But I believe some solution is possible.

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