Bicycle with rear suspension and relative device for compensating the travel of said suspension

Bicycle comprising:

• a frame,
• a rear wheel,
• a suspension system of the rear wheel with respect to the frame allowing a predetermined relative displacement between them, a system for driving the motion from a crankset to the rear wheel,
• wherein the drive system comprises a crankset (20) fixed to the frame (5), a hub and pinions assembly (22) fixed to the rear wheel, and a drive chain placed to connect them directly to each other, wherein the crankset and the hub and pinions assembly are subjected to reciprocal displacement by the action of the suspension system, where the crankset and the hub and pinions assembly each comprise at least one gear wheel engaged by said chain and a rotation shaft,
• wherein between the gear wheel and the shaft of at least one of said crankset and said hub and pinions assembly there is operatively interposed a compensation device placed to allow an compensation angular stroke between them from a rest position corresponding to an absence of chain pull, to a compensation position, corresponding to an action of chain pull generated by said reciprocal displacement, and vice versa,
• wherein said compensation stroke is limited to a predetermined angle, said compensation device comprises two main bodies that are rotatable with respect to each other and integrally respectively to the gear wheel and to the shaft, the compensation device further comprises at least one abutment element, integral with one of the two main bodies, interposed between a rest end element and a compensation end element, which are integral with the other main body, wherein the abutment element abuts alternately against the end elements defining the compensation stroke;
• wherein said compensation device comprises an adjustment system of said predetermined angle wherein at least one of the abutment element, the rest end element and the compensation end element have an adjustable position with respect to the others.