| 摘要 |
A derailleur activating device attachable to the handlebar of a bicycle also having a frame and a derailleur with a gear cable, wherein the device has a bracket tube secured to the handlebar of the bicycle, a shifting sleeve rotatably mounted on the bracket member, a pulley rotatably mounted on the shifting sleeve and a gear cable with an end of the gear cable attached to the bracket tube. The cable is wrapped partially around the pulley such that, when the shifting sleeve is rotated, the pulley is displaced causing the gear cable to be pulled such as to shift the gears of the derailleur.
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