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    • 1. 发明授权
    • Bicycle sprocket
    • US10138991B2
    • 2018-11-27
    • US15265808
    • 2016-09-14
    • SHIMANO INC.
    • Yasufumi Fukunaga
    • F16H55/12F16H55/30B62M9/10
    • A bicycle sprocket comprises a sprocket body, a shifting facilitation area, and a plurality of chain-driving teeth. The plurality of chain-driving teeth comprises a reference tooth and a first tooth. The reference tooth has a reference radial length defined radially outward from a root circle of the bicycle sprocket. The first tooth has a first radial length defined radially outward from the root circle of the bicycle sprocket. The first radial length is larger than the reference radial length. The first tooth is adjacent to the reference tooth in a circumferential direction defined about the rotational center axis without another tooth between the first tooth and the reference tooth. The first tooth is provided on a downstream side of the reference tooth in a driving rotational direction in which the bicycle sprocket is rotated about the rotational center axis during pedaling.