Resumen
Improvements in the construction structure of tricycles, which incorporating these tricycles at least a tubular frame and a rear axle with two end wheels linked to said frame, are characterized because the rear axle (1) is removable and is hard-encased in two orifices (5 and 6) diametrically opposed located on the wall of said tubular frame (2), including in that hard encastrated coupling anti twist means of that rear axle (1). (Machine-translation by Google Translate, not legally binding)