PROBLEM TO BE SOLVED: To increase a turn amount of a control plate relating to swiveling of a weight member, in an internally fitted shift hub. ;SOLUTION: An internally fitted shift hub for a bicycle is a hub able to switch a gear ratio by centrifugal force, to be provided with a hub shaft 21, a drive body, a driven body 23, a planetary gear mechanism, a clutch mechanism, and a clutch switching mechanism. The driven body has a hub shell able to rotate around the hub shaft. The planetary gear mechanism is arranged between the drive body and the driven body, rotation of the drive body is shifted to be transmitted to the driven body. In the clutch mechanism, the drive body and the driven body are connected/disconnected. The clutch switch mechanism has a weight member 77 swiveled in one end, control plate 75 able to turn between a connection position placing the clutch mechanism in a connection condition and a disconnection position placing it in a disconnection condition, and a link 78 turning a control member interlocked with movement of the other end of the swiveling weight member.;COPYRIGHT: (C)1999,JPO
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