| 摘要 |
A bicycle suspension system located between the cyclist's feet and the bicycle frame (2) and associated with the crank assembly. This suspension system is only active when the cyclist's weight acts in a direction opposite to the drive direction on one pedal, counter balancing the weight on the other pedal. Thus in travel over rough terrain where the cyclist adopts a stance on the bicycle such that both feet are equally weighted with the crank arms (5) in an approximately horizontal orientation the system will be active. Whilst pedalling the system is inactive and does not compromise the rigidity of the drive transmission.
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