20fFlipH0fFlipV0lineWidth15240posrelh0fLayoutInCell0fLayoutInCell0academic bicycle

摘要

A bicycle comprises front and rear wheels, a front fork, a handle bar, a seat slider mounted on a guiding frame with possibility of displacement along thereof and cranks which are connected to a drive carriage axle, are parallel and unidirectional, which length ranges from 20 to 50 cm and which are provided with pedals having foot fixing means.