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There have been designs, but cyclists tend to be picky about increases in weight or losses in efficiency. Bicycles do not have the problems of large spinning masses or rough clutching at low speed, and we seem to do OK with discrete steps in the gear ratio.


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Last year I found my girlfriend an older Takara (classic steel frame) with shimano SIS components, and it worked fine. Yes, the components were flimsy, junky, and jumped on certain gears, but it got the job done until we could upgrade it. The next year we purchased a Trek 600 (aluminum frame) with all shimano 600 components and stripped it. We then ...


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If its a low quality bike, you're probably best off just selling it and buying a decent bike to begin with -- there are good used road bikes for reasonably low prices. The first problem is that cheap road bikes likely don't even have cassette+freehub systems -- they have freewheels. High quality freewheels aren't cheap, and you do need a freewheel remover ...


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Main diference is tooth count, and that imposes differences in deraileur dimensions. As other answer mentions, gear range is wider in a MTB, so the rear deraileur has to be able to take-up more chain slack. A longer cage solves this. As long as they are designed with the same cable pull ratio, they are compatible, you can esaily fit an MTB deraileur to a ...


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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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The main differences to the drive train is the length of the rear derailleur arm. MTBs have lower and wider spaced gearing which means the rear derailleur has to handle a bigger span in chain length. A MTB typically has a large chainring with 42 teeth and a small one with 22 and a rear cassette with 12 - 28 tooth span - so the chain has to fit both a 42+28 ...



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