| 摘要 |
A transmission for a bicycle of the present invention comprises: a crank arm for receiving rotation driving force from a rotatable bicycle pedal so as to transmit the same to the side of a main shaft; a transmission gear section for changing the gear ratio of gears corresponding to a selected transmission level using the rotation force which has been transmitted to the main shaft; a lever control section for selecting one of the transmission levels of the transmission gear section according to the manipulation of the transmission lever so as to control one of respective cables connected to the respective transmission levels; and a clutching means driven by the one cable selected in the lever manipulation section for fixing one of the ring gears of the transmission gear section by tooth-engagement so as to control the transmission operation of the transmission gear section. |
