| 摘要 |
<p>A crank mechanism (P) for bicycles, in particular racing bicycles on roads, unsurfaced roads or tracks, comprises a winch rod (1), pedaling means (4) coupled with an end (6) of the rod (1), and also an arm (13') of a connecting-rod (13) of which one end is rotatingly coupled with respect to said rod (1) in correspondence with said end (6) of the rod (1); the pedaling means (4) are rigidly fixed to an opposite end of said arm (13').</p> |
