The design method of early Europeans strange world's first truly practical bike appeared in the early 19th century. 1817, Paris, France, Germany De Laisi invented two rounds with a wooden bicycle handlebars. Bike after the advent of the Europeans quickly became the favored means of transport. Some idea of the 19th century Europeans out of some ideal bike map.cheap puma shoesThe early stages of bicycle invented, people think that the greater the faster the driving wheels, the wheels almost two men riding a bike for a height of a man. The invention of the bike stage, and some people do not put the two wheels of a bike designed around the place, but around the two wheels make the place, this bike's appearance is somewhat similar to a wheelchair. This is the early Europeans a three-wheeled bicycle design. Three-wheeled bicycle balance better and easier for people to learn to ride three-wheeled bicycle. With future improvements in bicycle technology, gradually developed into a three-wheeled bicycle cargo transport. This is a three-wheeled bike, but the designers of two momentum wheels on the car front, one rear wheels on the car. When people ride this bike can do in front of a passenger. This bike can take modern man in the back of the bike design just the opposite. ① body composition components: including frame, puma shoes 2011fork, handlebar, saddle and fork and other pieces, the main body of the bicycle. ② transmission parts: including pedals, cranks, sprockets, chain, bottom bracket and flywheel, etc., by the action of human foot pedal, the above rotation wheel drive transmission parts, drove forward. ③ action part: the front and rear wheels, including front and rear axle parts, spokes, rims (rims) and tires. ④ safety devices: including brakes (brakes), lights, bell, reflectors and so on. According to need, but also add some accessories such as brackets, racks, insurance, forks, fenders, pump and so on. In addition, institutions with speed sports cars, race cars, mountain biking, etc. is also equipped with variable speed controller and etc. before and after the call chain. Can be divided into categories according to use trucks, ordinary cars, light trucks, sports cars, race cars, mountain bikes, vehicles (such as the exercise bike, acrobatics car) and so on. Depending on the object can be divided into men and cars, women car and stroller and so on. According to the size of the wheel can be divided into 71 cm diameter, cars, car 66 cm,Puma Espera61 cm and other vehicles. According to the main frame and other parts of the timber can be divided into carbon steel cars, steel cars, aluminum and other vehicles. According to the structural frame can be divided into bars stacked cars, trucks and other removable car and overall. Principle of the bicycle frame, tires, pedals, brakes, chain, 25 parts, the basic components are indispensable. Among them, the frame is a bicycle frame, it has to bear the weight of most people and goods. Characteristics in accordance with the work of the various components can be broadly divided into navigation systems, drive system, brake system: 1, orientation systems: the handlebar, fork, front axle, front wheel and other components. By manipulating the handlebars can ride to change direction and keep the body balanced.
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