The Push-Rod suspensions are connected with two connecting rods pivoted to the arm swinging, and drive two rockers that regulate progression. Each of the rods pushes the barbell with the same force in order to balance it. This system alloows the use of small size and dimension components and to same considerable weight and energy. Double push rocker can be replaced very quickly in order to change progression and the linkages can also be adjusted very quickly to optimize performance. This mechanism distributes power equally and symettrically on the two arms and void the twists of moving parts typical in ordinary motorcycles; consequenly also the weight and dimensions of the swingarm are significatly reduced.