Bicycle with rear suspension and relative device for compensating chain pull

Bicycle comprising a frame, a rear wheel, a suspension system of the rear wheel with respect to the frame allowing a predetermined relative shift between them, a motion transmission system from a crankset to the rear wheel,

• wherein the transmission system comprises a crankset which is fixed to the frame, a hub and sprocket fixed to the rear wheel and a transmission chain directly connecting them to each other,
• wherein the crankset and the hub and sprocket are subject to reciprocal displacement due to the action of the suspension,
• wherein the crankset and the hub and sprocket each contain at least one chainring engaged by said chain and a rotation shaft,
• wherein a compensation device is operatively interposed between the chainring and the shaft of at least one said crank and said hub and sprocket and is set to allow an angular compensation stroke between them from a rest position which corresponds to the absence of the chain pull, to a compensation position, corresponding to a chain pull action generated by said reciprocal displacement, and vice versa,
• wherein said compensation stroke is limited to a predetermined angel, said compensation device comprises two main bodies relatively rotatable to each other and integrally rotatable to the chainring and the shaft, the compensation device also compromises at least one brake element integral with one of the two main bodies interposed between a rest end element and a compensation end element integral with the other main body,
• wherein the brake element stops alternately against the end elements defining the compensation stroke;
• wherein said compensation device (240) compromises a plurality of pairs of brake elements and respective compensation end elements, where at least one shock-absorbing element is operationally interposed between at least one pair able to deform in correspondence with a final section of the compensation stroke alone and at least one limiting element is interposed between at least another pair as an alternative to the shock absorbing element which provides a stop to the respective brake element to limit the maximum deformation of the shock-absorbing element.