Disclosed is a tricycle for extreme sports, improved from conventional infant riding instruments. A main frame has a rear portion bent at 15-30 degrees and a coupling surface for coupling the saddle and the rear wheel shaft. A saddle is fixed to the coupling surface of the main frame. A back support surrounds upper rear body of rider. Wings are formed on both sides of the back support to transmit rider's weight to the main frame according to transfer of gravity center of rider. The rear wheel shaft is coupled to a lower surface of the coupling surface and also includes a rear wheel fixing frame hinged to center of the rear wheel shaft and a suspension composed of damper and spring between the rear wheel fixing frame and the rear wheel shaft. A shock-absorbing unit made of rubber block is positioned between the saddle and the coupling surface.
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