| 摘要 |
PCT No. PCR/SE89/00530 Sec. 371 Date Apr. 19, 1991 Sec. 102(e) Date Apr. 19, 1991 PCT Filed Sep. 29, 1989 PCT Pub. No. WO90/03305 PCT Pub. Date Apr. 5, 1990.A device for a bicycle comprising a drive transmission which is coupled to the drive wheel of the bicycle and includes a gear change mechanism with a number of different size chain sprockets, a shifting device coupled to the gear change mechanism and a freewheel coupling arranged between the drive wheel and the chain sprockets. Moreover, the device comprises a disengage mechanism (34-37) which is coupled to the shifting device (20) of the gear change device by means of a friction element (19) and a drive member (23) for enabling simultaneous disengagement of the freewheel coupling and change of gear. |
