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Bicycle is one of the best tools for sports and leisure activities. Kinematics experts believe that cycling, like running, walking and swimming, can exercise the endurance of internal organs and improve the heart and lung function. Because riding a bicycle is a heterolateral dominant movement, the alternating pedaling of two legs can also make the brain functions of the left and right sides develop in a balanced and coordinated manner, thus improving the agility of the nervous system. It is understood that there are 20 million people riding bicycles to exercise in the United States today; In Europe, cycling "one-day tour" has also become one of the most fashionable sports.

Frame is the soul of bicycle. A good bicycle frame must meet the three conditions of light weight, sufficient strength and high rigidity. As a kind of bicycle sport, the lighter the weight is, the better, so the more labor-saving and faster you can ride; Enough strength means that the frame will not break or bend under high strength riding; High rigidity means that the frame should be rigid enough. Sometimes a frame with poor rigidity may not have safety concerns, but the transmission of the frame force is poor when riding, which makes the rider feel heavy when treading on it. Even if the frame is light and strong enough, but the rigidity is poor, it is still an unqualified sports bike.