The traditional two-eighths bicycle gets its name

Traditional Erba Bicycle Name Wheel

A. Expanded Information

The 1960s and 1970s saw the popularity of the bicycle as a means of transportation that could carry small amounts of cargo. Whether it is on the road in the city, or on the dirt road in the countryside, everywhere you can see the "two eight" bicycle loaded with people or goods. "The bicycle became an indispensable means of transportation for every household in those days.

People often say that the two-eight bicycle in the "two-eight" refers to the wheel diameter of 28 inches, an inch = 2.53995 cm, 28 inches = 71.1186 cm. In the 21st century, due to the rapid development of society, the bicycle is not only a means of transportation, people also use it as a fitness tool.

The composition of the bicycle

1. The body part

includes the frame, fork, handlebar, saddle, and fork joints, etc., which is the main body of the bicycle.

2. Transmission part

includes pedals, cranks, sprockets, chains, center shafts and flywheels, etc. The pedals are pedaled by human power, and the wheels are driven to rotate through the above transmission parts to drive the bicycle forward.

3. Action part

That is, the front and rear wheels, including the front and rear axle parts, spokes, rims (rims), tires and so on.

4. Safety devices

Including brakes (brakes), lights, bells, etc..

Three, the principle of the bicycle

The two eight bicycle frame, tires, pedals, brakes, chains, and other 25 parts of its basic components are missing. Among them, the frame is the skeleton of the two-eight 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, braking system.

1. Guiding system: composed of handlebar, fork, front axle, front wheel and other components. The rider can maneuver the handlebar to change the driving direction and keep the balance of the body.

2. Drive (transmission or travel) system: consists of footpegs, center shaft, disc, crank, chain, flywheel, rear axle, rear wheel and other components. The pedaling force of the human foot is driven by the stirrups through the crank, sprocket, chain, flywheel, rear axle and other parts, so as to make the two-eight bicycles keep moving forward.

3. Braking system: it consists of brake components, the rider can manipulate the brake at any time, so that the traveling bicycle decelerates, stops and ensures the safety of driving.