| 摘要 |
PROBLEM TO BE SOLVED: To provide a bicycle derailleur capable of changing a shift by an easy operation that is only a push and movement of one shift lever. SOLUTION: The derailleur has an installation member to be connected to a part of a bicycle; a chain guide movably connected to the installation member such that the chain guide shifts a chain of the bicycle sideways; and a chain guide positioning mechanism including an operation cam operationally connected to the chain guide. The operation cam can be connected to a control member and can rotate only to one direction according to operation of the control member for moving the chain guide from a first position to a second position.
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