Forecarriage of a rolling motor vehicle with three or four wheels, comprising: a forecarriage frame, at least a pair of front wheels (10',10") kinematically connected to each other and to the forecarriage frame by means of a kinematic roll mechanism, a roll control system comprising a rod having a first and a second end opposite each other which connect by means of hinging means (101 ', 101 "; 102', 102") a first and a second anchoring portion of the forecarriage directly to each other, wherein at least one of said first and second anchoring portions is subject to roll movements of said two front wheels (10', 10"), characterized by said roll control system comprising a first damper device suitable to dampen - in a predetermined angular range- the rotation movements of said rod, said angular range corresponding to the angular roll range of said rod, wherein said first damper device comprises a kinematic connecting rod-crank (210, 220) which is connected to said rod (110 and to said first anchoring portion so as to define an articulated quadrilateral, wherein said kinematic connecting rod-crank (210, 220) comprises an axial damper, and wherein said first damper device further comprises an actuator suitable to impart an shift movement to said kinematic connecting rod-crank (210, 220) and thus vary the configuration of said kinematic connecting rod-crank (210, 220) between: - a damped rolling configuration, in which said connecting rod is aligned with said crank and said articulated quadrilateral is degenerated into a triangle thus defining an extensible strut countering the rotation of the rod within said predetermined angular range; and - at least one free rolling configuration, wherein said connecting rod is misaligned with respect to said crank and said articulated quadrilateral has a non-degenerate configuration which leaves the rolling movements free; said first damper device further comprising release means to assist said actuator in the passage from said limited rolling configuration to said at least one free rolling configuration. a forecarriage frame, at least a pair of front wheels (10',10") kinematically connected to each other and to the forecarriage frame by means of a kinematic roll mechanism, a roll control system comprising a rod having a first and a second end opposite each other which connect by means of hinging means (101 ', 101 "; 102', 102") a first and a second anchoring portion of the forecarriage directly to each other, wherein at least one of said first and second anchoring portions is subject to roll movements of said two front wheels (10', 10"), characterized by said roll control system comprising a first damper device suitable to dampen - in a predetermined angular range- the rotation movements of said rod, said angular range corresponding to the angular roll range of said rod, wherein said first damper device comprises a kinematic connecting rod-crank (210, 220) which is connected to said rod (110 and to said first anchoring portion so as to define an articulated quadrilateral, wherein said kinematic connecting rod-crank (210, 220) comprises an axial damper, and wherein said first damper device further comprises an actuator suitable to impart an shift movement to said kinematic connecting rod-crank (210, 220) and thus vary the configuration of said kinematic connecting rod-crank (210, 220) between: - a damped rolling configuration, in which said connecting rod is aligned with said crank and said articulated quadrilateral is degenerated into a triangle thus defining an extensible strut countering the rotation of the rod within said predetermined angular range; and - at least one free rolling configuration, wherein said connecting rod is misaligned with respect to said crank and said articulated quadrilateral has a non-degenerate configuration which leaves the rolling movements free; - a damped rolling configuration, in which said connecting rod is aligned with said crank and said articulated quadrilateral is degenerated into a triangle thus defining an extensible strut countering the rotation of the rod within said predetermined angular range; and - at least one free rolling configuration, wherein said connecting rod is misaligned with respect to said crank and said articulated quadrilateral has a non-degenerate configuration which leaves the rolling movements free; said first damper device further comprising release means to assist said actuator in the passage from said limited rolling configuration to said at least one free rolling configuration.