Abstract: A structure of a front fork 10 for a bicycle, which has a buffering mechanism relatively easy to mount and relatively simple in construction, comprising a pair of expandable fork blade portions 13 for the bicycle, including a pair of supporting pipes 21 extending downwardly from a crown portion 11, and a pair of sliding pipes 22 sidably fitted over the supporting pipes 21, wherein cylindrical spring structure 18 for elastically supporting each sliding pipe 22 is provided between the top end 22a of the sliding pipe 22 and the bottom end of the crown portion 11, and the cylindrical spring structure 18 is so arranged as to surround the supporting pipe 21, and wherein a stopper 30 for regulating a stroke of vertical movement of a connection member 17 is provided between the crown portion 11 and the connection member 17 connecting the pair of sliding pipes 22 in a body.

Abstract: A belt driving apparatus for a bicycle is disclosed wherein a driving gear has an outer gear over which is trained a toothed belt to impart rotational force to the bicycle rear wheel. An inner gear disposed within the outer gear includes teeth along its outer periphery meshing with teeth formed on the inner periphery of a crank gear disposed between the inner and outer gears. The crank gear is mounted on a crank shaft.