Bicycle has bicycle frame with bottom bracket shell, in which pedal bearing shaft is placed, where foot pedals are formed at both sides of pedal bearing shaft

摘要

The bicycle (1) has a bicycle frame (200) with a bottom bracket shell (210), in which a pedal bearing shaft is placed. The foot pedals (230) are formed at both sides of the pedal bearing shaft. The transmissions (250,260,270) are provided for transmitting performance of the foot pedals to a drive wheel (5) of the bicycle. An auxiliary drive (10) has two fly wheels coupled with each other for detention of energy. An independent claim is also included for an auxiliary drive with a transformation unit.