Disclosed is a crank variable-speed gear device (100) wherein the gear ratio can be increased to 1.6:1 to 1.8:1 through a gear assembly and a latch assembly, and the gear ratio can also be changed to 1:1, if necessary, thereby providing an excellent transmission efficiency, facilitating the manipulation thereof, and making it possible to provide a compact and lightweight bicycle.


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    Title :

    Crank variable-speed gear device for increasing rotational power


    Contributors:

    Publication date :

    2025-01-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer



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