OSCILLATION SYSTEM OF THE SWINGARM OF A WHEEL WITH RESPECT TO THE FRAME OF A VEHICLE

Oscillation system (1) of the swingarm (2) of a wheel (3) with respect to the frame (4), wherein said swingarm is rotatably constrained to said frame at a first pin (5), said system comprising at least one connecting rod (6) and at least one crank (7), wherein said connecting rod (6) comprises a first end (6a) connected to said frame and a second end (6b) rotatably constrained to said crank (7) at a further first end (7a) of said crank (7), and wherein said crank (7) comprises a further second end (7b) rotatably constrained to said swingarm at a second pin (8) distinct from said first pin (5), characterized in that said connecting rod and/or said crank comprise(s) means (11) to vary the distance (D) in a dynamic manner between said first end (6a) and said second end (6b) of said connecting rod, respectively, and/or between said further first end (7a) and said further second end (7b) of said crank.