Bicycle is a human-driven two-wheeled means of transportation. With its environmentally friendly, convenient and healthy characteristics, it has become a widely used travel and sports tool around the world. The following is a detailed introduction about bicycles:

I. Basic structure

Frame: The core skeleton of a bicycle, connecting all components, usually made of steel, aluminum alloy, carbon fiber and other materials.

Transmission system: including pedals, cranks, chains, flywheels and rear wheels, which transmit power to the wheels by pedaling.

Brake system: It is divided into V brakes, disc brakes, drum brakes, etc., which are used to control the speed and stop.

Wheel group: It is composed of rims, spokes and flower drums, which affect the stability and speed of riding.

steering system: including handlebars, front fork and front wheels to control the direction of riding.

Other components: such as seats, pedals, lights, fenders, etc., improve comfort and functionality.