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Speed change hub used for bicycle, has rotation control portion which is provided in rear end of frame to control operations of rotation gear shift of bicycle
Speed change hub used for bicycle, has rotation control portion which is provided in rear end of frame to control operations of rotation gear shift of bicycle
A rotation control portion (71) is provided in the rear end of a frame to control the operations of a rotation gear shift of a bicycle. The rotation control portion helps a gear shift mechanism (7) in switching and changing the speed of a power transmission route by sliding a clutch through the axial direction of the cam mechanisms (721,733).
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