The invention provides a bicycle frame. The bicycle frame comprises a head tube, lower tubes and upper tubes, wherein the lower tubes are two straight tubes, the distance between the two lower tubes becomes larger gradually from front to back, the front end of each lower tube is fixedly connected with the lower side of the head tube, and the tail end of each lower tube extends to a rear wheel axle and is fixedly connected with a connecting piece; a bottom bracket transversely penetrates through the middle portions of the lower tubes; the upper tubes parallel to each other are arranged above the lower tubes, the front end of each upper tube is fixed to the front end of the corresponding lower tube, longitudinal reinforcing ribs are arranged between the upper tubes and the lower tubes, and horizontal reinforcing ribs are arranged between the upper tubes and between the lower tubes; a saddle fixing base is arranged on the upper tubes, and the tail end of each upper tube extends to the tail end of a rear wheel. According to the bicycle frame, a saddle is fixed on the upper tubes, vertical tubes are omitted, the lower tubes and the upper tubes extend to be fixedly connected, and a horizontal fork and a vertical fork are omitted; furthermore, the extending parallel upper tubes can also serve as a supporting frame for a backseat, so that the structure becomes simpler and lighter and usability is higher.


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    Title :

    Bicycle frame


    Contributors:

    Publication date :

    2015-07-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62K Fahrräder , CYCLES



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