The bicycle frame, tires, pedals, brakes, chains and other 25 parts, its basic parts are indispensable.Among them, the frame is the frame of a bicycle, which bears the greatest weight of people and goods.According to the working characteristics of each component, it can be roughly divided into guiding system, driving system and braking system:
1. Guidance system: it is composed of handlebars, front forks, front axles, front wheels and other components.The rider can control the handlebars to change direction and maintain balance.
2. Drive (drive or walk) system: by pedal, shaft, sprocket, crank, chain, flywheel, rear axle, rear wheel and other components.The pedal force of the human foot is driven by the foot pedal through the crank, chain, chain, flywheel, rear axle and other parts, so that the bicycle continues to advance.
3. Braking system: it is composed of brake parts. The rider can control the brake at any time to slow down and stop the bicycle and ensure the safety of driving.