The invention relates to the personal mobility sector, bicycles and tricycles. It is a mechanism that allows cycling on foot and running as if walking, the feet pedal along an elliptical orbit and also allows to pass the conventional bicycle by removing the connecting screw of the head (4) and lock the two rods to a position fixed H or I. It is an operation that is done in a moment. During pedaling the connecting rods extend and contract so that the foot in the pedaling cycle describes an elliptical path. The rod is telescopic and has an articulated head with bearings, which follows a track of rectangular section and elliptical shape and is mounted after the bicycle plate. The pedal is solidary of a, say clog designed exprofeso to receive the foot of the driver and is practical and easy to put and remove while driving, maintaining its position and avoiding the possibility of a slip. The APC system, the same can be assembled from origin by a manufacturer of bicycles or tricycles as well as in the maintenance workshop of the user on any existing bicycle, which meets the following requirements: - Bicycle with open frame without horizontal or inclined tube, such as folding bicycles, Dutch bikes and women's bikes. - Bicycle with crown-pinion and chain type pedaling system. It is a new paradigm in the world of cycling and opens a range of possibilities both for the users of all bicycles, of the indicated range, and for the world of sport that will surely create the inclination to go on a standing cycle, (a model is valid for all, one size fits all) and because it is a pleasant exercise, in an ergonomically natural body position. (Machine-translation by Google Translate, not legally binding)
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