To provide a transmission system of a bicycle, which includes many sprockets, and can secure many speed change ratios and improves linearity by increase in a sprocket diameter.
A transmission system of a bicycle includes a sprocket assembly mounted to a freewheel body 22 of a hub of a bicycle rear wheel and a bicycle chain 15 engaged with the sprocket assembly 16. The sprocket assembly 16 includes at least 11 sprockets 1 to 11. All of the sprockets of the sprocket assembly have an overall axial dimension M which is lower than or equal to a predetermined axial distance E between a plane Z including spoke attachment seats of the hub and a plane T formed in an fastening portion to a frame 53. The chain has a maximum thickness of 4.6 mm or more to 5.8 mm or less.
| JPH10181668A | 1998-07-07 | |||
| JP2005231556A | 2005-09-02 | |||
| JP2004090914A | 2004-03-25 |
| GB1721823A | ||||
| EP1721823A2 | 2006-11-15 |
Masashi Noda
Kenro Tsutsumi
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