Daido Kogyo Co., Ltd.

Naohiro Higashide

A roller chain includes an inner link and an outer link. A bush is projected out of an outer side surface of an inner plate by a predetermined amount and an end surface of a bush being projected is brought into contact with an inner side surface of the outer plate to form a predetermined gap between the outer side surface of the inner plate and the inner side surface of the outer plate. The predetermined gap is within a range of 7 to 18[%] of the distance between the inner side surfaces of the pair of outer plates.

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Ishikawa, Japan

Naohiro Higashide