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Back-type bicycle frame: The metal hook is connected with the sheet metal gap of the rear tailgate, which generally does not affect the opening of the rear tailgate. The advantage is that compared with the overhead bicycle frame, it is more convenient to take and place the bicycle. The disadvantage is that the metal hook that plays a fixed role will more or less affect the body sheet metal. Sometimes the bicycle hanging in the air may block the vehicle number plate. There are many kinds of products of this kind, No brand has the most obvious advantages.
The frame is generally made of ordinary carbon copper pipes through welding and combination. In order to reduce the weight of the pipe and improve the strength, high-grade bicycles are made of low-alloy steel pipes. In order to reduce the resistance of fast driving, some bicycles also use streamlined steel pipes.
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Ningbo Yinzhou Hishen Hardware Co., Ltd.