| 摘要 |
The bicycle (1) has two large wheels (2a,2b) between which is an adjustable seat (5) for the user who is thus located in the axis sof the wheels whilst driving. The seat is connected by a frame (6) with frame rims (7a,7b). These frame rims are connected with drive rims (8a,8b). The drive rims are connected by spokes (4) with the wheels rims. Around the wheel rims are tires (2c,2d) for contact with the road. The user drives the vehicle by pedals (13), which via a drive wheel (12) and a drive ring (17) drive a further drive wheel (15). This latter wheel is connected with a drive axle (14), on which two outer end drive wheels (16a,16b) are fixed. These outer end drive wheels drive two V-belts (9a,9b) which in turn drive the drive rim (8a,8b). The further drive wheel (15) is also provided with an air tire (11) for contact with the road.
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