| 摘要 |
PROBLEM TO BE SOLVED: To provide a bike which satisfactorily benefits from the advantages of a belt transmission without having the drawbacks linked to installing the belt transmission.SOLUTION: The bike includes: a first frame element 10 extending from one end carrying a front wheel housing to a lower end 10b; a second frame element 20 extending to a lower end rigidly fixed to the lower end 10b; a rear fork 8 having a chainstay 32 extending from the first frame element to a spindle support 33; a seat stay 36 extending from the spindle support to the second frame element; a crankset 40 having a lateral chainring 41; a rear wheel driven by a sprocket 45 inside the fork; and a belt 43 engaged with the chainring and the sprocket. The chainstay has a major portion 61 arranged below a straight line D passing through the lower ends of the chainring and of the sprocket. The belt extends through the triangle formed by the second frame element, the chainstay and the seat stay. |
