Bicycle derailleur gearshift position indicator

A bicycle derailleur gearshift position indicator comprising:

• a cable take-up wheel rotated with the derailleur cable of the derailleur system of a bicycle subject to the gearshift position of the derailleur system, said cable take-up wheel comprising a recessed receiving portion and a push wall disposed in said recessed receiving portion;
• a gearshift position indication member, said gearshift position indication member comprising a plurality of indication plates arranged in parallel corresponding to the number of gearshift positions of the derailleur system of the bicycle, said indication plates each having a bottom protruded block respectively supported in said recessed receiving portion of said cable take-up wheel and a top indication face;
• and
• a housing, said housing comprising a receiving chamber, which receives said gearshift position indication member, and a view window through which the rider of the bicycle views the indication face of said indication plates of said gearshift position indication member;
• wherein when said cable take-up wheel is rotated upon operation of the derailleur system by the rider of the bicycle, the push wall of said cable take-up wheel is moved with said cable take-up wheel to push said indication plates of said gearshift position indication member one after another, enabling the rider of the bicycle to view the position change of said indication plates indicative of the position change of the gearshift position of the derailleur system of the bicycle.