| 摘要 |
A chain wheel assembly for a bicycle includes a large chain wheel (5), a small chain wheel (6), and a crank arm (1) for supporting the chain wheels. The crank arm (1) has an arm body (1a), a boss (3) for connecting the crank arm (1) to a crank axle (9) of the bicycle, and wheel mounting extensions (10) extending radially outwardly from the boss (3). The small chain wheel (6) is connected to the crank arm (1) through a first connecting device (11,12) provided on the wheel mounting extensions (10). The large chain wheel (5) is connected to the small chain wheel (6) through a second connecting device (13) arranged radially outwardly of the first connecting device (11,12). The large chain wheel (5) is connected to the crank arm (1) only through the second connecting device (13) and small chain wheel (6). <IMAGE> |
