A bicycle sprocket comprises a first sprocket body, first sprocket teeth, a first side surface, a second side surface, at least one shifting facilitation projection, at least one guide portion, and at least one recess. The at least one guide portion is provided on a first side surface to guide a bicycle chain from the bicycle sprocket toward a smaller sprocket in a second shifting operation. The at least one recess is provided on the first side surface so as to be adjacent to the at least one guide portion in a circumferential direction defined about a rotational center axis. At least one of the at least one recess is provided in an upstream angular area defined from the at least one shifting facilitation projection to an upstream side in a driving state and within 90 degrees in the circumferential direction.


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    Title :

    Bicycle sprocket and bicycle sprocket assembly


    Contributors:

    Publication date :

    2020-04-21


    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 / B60B VEHICLE WHEELS , Räder für Fahrzeuge / F16H Getriebe , GEARING



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