| 摘要 |
The invention relates to a bicycle and like, having a rear wheel (22) or flywheel, and provided with a pedal group comprising a central shaft and a gear wheel (5) integrally coupled each other, a left crank (1) and a right crank (1), coupled on the two ends of the central shaft, characterised in that a pedal crank (7) is rotatably coupled with each one of said left and right cranks (1) by mechanical means (6, 8, 10) creating a freewheel like mechanism between the crank (1) and the corresponding pedal crank (7), a pedal (12) being coupled with one end of each one of the two pedal cranks (7).
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