| 摘要 |
PROBLEM TO BE SOLVED: To provide a three-wheel series bicycle reduced in a pedaling force. SOLUTION: The three-wheel series bicycle includes a pressure reducing wheel 2 so as to position a shaft 8 rotatably supporting the pressure reducing wheel 2 to a setting frame 3 at a position close to a rear wheel 1 from the gravity center of a saddle 6, for reducing the predetermined ground surface pressure of a rear wheel tire 1. The pressure reducing wheel 2 is equipped with a vertical movement adjusting function at the frame 3 and can vertically move. COPYRIGHT: (C)2011,JPO&INPIT
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