HIGH SPEED AND A LOW SMALL-SIZED BICYCLE

摘要

PURPOSE: A high-speed low small-sized bicycle is provided to enable even utilization of three main muscles of a lower body and reduce the fatigue of a rider because of the low height. CONSTITUTION: A high-speed low small-sized bicycle is configured as follows. Front and rear wheels are installed with axles around a saddle(2). A crank shaft(6) is located behind a head tube(5) to implement a lower body angle of 40~65° with respect to the center of the saddle. A handle is located in the front of a crank shaft center line(24) to implement a seat tube angle of 30~50° and a human body truncus angle of 10° or greater so that the sum of the lower body angle and the human body truncus angle is 60° or greater. An elliptical gear(13) is fixed by a shaft on the crank shaft. A seat post shock absorber can vertically move on a linker unit(15) to prevent power loss. A pelvis receiver(12) supporting rider's pelvis is installed on the saddle.