Rear chain shifter for bicycle
A technology for rear derailleurs and bicycles, which is applied to vehicle components, vehicle gearboxes, chain/belt transmissions, etc., and can solve problems such as difficult nut tightening operations
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[0033] overall composition
[0034] FIG. 1 shows a bicycle to which an embodiment of the present invention is mounted. The bicycle has: a frame 1 having a frame body 2 and a front fork 3; a handle portion 4; a front wheel 5f; a rear wheel 5r; a drive unit 7 for transmitting the rotation of the pedal 6 to the rear wheel 5r; front and rear brake devices 8f , 8r.
[0035] The frame body 2 is composed of a front tube 15 which is rotatably installed on the shaft system inclined obliquely forward at the front portion of the front fork 3, an upper tube 16, a lower tube 17, a front triangle part of the seat tube 18 and It has a well-known diamond-shaped frame body formed by the rear triangle portion of the seat stay 19 and the chain stay 20 .
[0036] The seatpost 9a to which the saddle 9 is attached is attached to the seat tube 18 so that the vertical position can be adjusted. A front wheel 5f is attached to the lower end of the front fork 3 . The drive unit 7 is provided at the ...
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