| 摘要 |
A bicycle (1) or other cycling apparatus wherein the first chain (15) from the pedal driven gear (10), located coaxially with the rear wheel (3), terminates in an intermediate gear set (12, 14) and a second chain (9) from said intermediate gear set (12, 14) returns to drive the rear wheel (3). With such an arrangement, it is possible to include additional gear ratios to said cycle and cover a wide range of gear ratios. By situating the pedals (11) around the rear axle, the frame (4) can also be shortened and simplified to provide a small and lighter frame cycle. The frame (4) can be provided partially by a portion of an existing bicycle with modifications to allow conversion from a conventional model.
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