Bicycle rear derailleur

Details Bicycle rear derailleur Bicycle rear derailleur

B - Operations, Transporting

62

M

74/33

B62M 9/00 (2006.01) B62M 9/16 (2006.01)

Patent

CA 1236995

ABSTRACT OF THE DISCLOSURE A bicycle rear derailleur including a tensioner frame which rotatably support a guide pulley and a tension pulley, a shifter for shifting the tensioner frame in directions substantially parallel to an axis of a rear wheel hub, the tensioner frame including a tension pulley support arm which is resiliently urged to pivotally move rearwardly of the bicycle, and a compensating mechanism for compensating a sagging in an endless drive chain, which is arranged to stretch out the drive chain rearwardly of the bicycle so that a distance between a geometrical vertical line passing through a center of the tension pulley and a vertical tangential line at a rearmost point of a rearwardly stretched portion of the drive chain is larger than a radius of the guide pulley when the tension pulley support arm takes its rearmost position.

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