Main Components of Bicycles：

A bicycle consists of 25 essential parts, including the frame, tires, pedals, brakes, chain, and others, each of which is indispensable.

The frame, serving as the bicycle's backbone, bears the greatest weight of the rider and cargo.

Based on the functional characteristics of each component, they can be roughly categorized into the steering system, driving system, and braking system:

1. Steering System: Comprising components such as handlebars, front fork, front axle, and front wheel, riders can manipulate the handlebars to change direction and maintain balance while riding.
2. Driving (Transmission or Propulsion) System: Composed of parts like pedals, crankshaft, sprockets, cranks, chain, flywheel, rear axle, and rear wheel, human pedaling force is transmitted through the pedals to propel the bicycle forward via the chain wheel, chain, flywheel, rear axle, and related components.
3. Braking System: Consisting of multiple components that riders can control at any time. It enables the bicycle to slow down, stop, and ensure safe riding. Additionally, for safety, aesthetics, and practicality, components such as lights and brackets are also installed.