A top speed of bicycles

Bicycle top speed of 268.831 kilometers, is on October 3, 1995 by the Dutch Fred roma's bell by bonner, salt flats in Utah in the United States. This Folding electric bikeswas in large part thanks to his leading vehicle produced by low pressure air pockets. And people's normal walking bike is 15 km per hour. Chrome molybdenum steel frame: 90 s, bicycle frame with chrome molybdenum steel system for the mainstream. Its distortion performance and good Three wheel bikes properties, high temperature will not affect the material, when welding the price is cheap. But the weight is heavy, easy to oxidation. Appeared to overcome its shortcomings, give play to the advantages of the new material, chrome molybdenum steel frame again. Carbon fiber frame: light and absorb the impact of the ground, quick material of backwash force, etc., is the ideal bike frame material. Carbon fiber grade, tonnage high elasticity are also higher and higher, the price is expensive. There are several kinds of methods, such as with adhesive on the mould, overlapping carbon fiber, heat treatment, solidification, molding, etc. The proportion of titanium frame, titanium is 55% lighter than steel, it is not easy to oxidation. In order to improve the tensile strength, has mixed aluminum, vanadium and titanium alloy. Such as welding needs to be done in a vacuum processing complex, frame price expensive. Aluminum frame, aluminum alloy frame of light and strong rigidity. After special processing a frame of only 1 kg in weight. Aluminum pipe tends to large diameter, to alleviate the too strong rigidity, small cars fork pipe and adopt absorb the impact of carbon fiber and other popular attention.