1. Ordinary bicycles
Generally refers to kun bicycles. The riding posture is a standing position with bent legs. The advantage is that it is more comfortable and less likely to get tired after riding for a long time. The disadvantage is that it is difficult to accelerate in a bent-leg posture, and ordinary bicycle parts mostly use very ordinary parts, making it difficult to achieve high speeds.
2. Ordinary bicycles
Generally referred to as kun bicycles, the riding posture is standing with bent legs. The advantage is that it is more comfortable and less likely to get tired after riding for a long time. The disadvantage is that it is difficult to accelerate in a bent-leg posture, and ordinary bicycle parts mostly use very ordinary parts, making it difficult to achieve high speeds.
3. Exercise bicycles
Using the straight-line method of foot-pull pedals and the swing-type hand-pulled swing bar to perform exercise, it not only increases the driving speed of the bicycle, but also exercises the leg muscles. Arm muscles. Obtained a number of national patents, it is suitable for middle-aged and elderly people to use as a means of transportation for fitness, and can also be suitable for young people to use for tourism and entertainment.
Extended information
Origin:
Origined in Europe. In 1790, the Comte de Sivrac of France installed two wheels on a wooden horse, and people rode on it and pushed forward with their feet, which was called a wooden horse wheel. In 1816, Baron Karl von Drais of Germany invented a wooden wheel cart with a handlebar that could control the direction. In 1818, he received a British patent.
In 1839, Scottish blacksmith Kirkpatrick MacMillan made an iron bicycle with a crank connecting rod structure driving the rear wheel. In 1861, Michaud and his son in France invented a bicycle with a large front wheel and a small rear wheel. The front wheel was equipped with a crank and a rotating pedal. It was exhibited at the Paris Exposition in 1867.
In 1874, H.J. Lawson of England adopted a chain drive structure on a bicycle. In 1886, the British J. Starley used ball bearings and brakes, and changed the front and rear wheels to be the same size. In 1888, British John Boyd Dunlop successfully used pneumatic rubber tires, and the bicycle was basically perfect.
Baidu Encyclopedia—Bicycle