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  1. #1
    Part-time epistemologist invisiblehand's Avatar
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    Another internally geared crank

    http://www.bikerumor.com/2010/04/26/...for-commuters/

    It isn't clear to me whether one can swap the chainrings. But given the cost of a Schlumpf Drive, an alternative is a plus.

  2. #2
    jur
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    Good development. I am a little leery of small chainrings, which wear quicker. Ability to swap out rings would be essential.
    My folding bike photo essays www.dekter.net/

  3. #3
    Senior Member randya's Avatar
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    I'm willing to bet the chainring is replaceable. I t also looks like an external mechanism, as opposed to the schlumph which I believe houses the mechanism within the BB (feel free to correct me here).

  4. #4
    jur
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    The Schlumpf's actual planetary gear mech and clutch is also external but some of the gear change parts are inside the spindle.
    My folding bike photo essays www.dekter.net/

  5. #5
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    Interesting - perhaps it could also work with larger rings :
    e.g. 35 * 1 / 1.6 -> 35 / 56 - giving a really wide range to small wheeled bikes.

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