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 second anchoring portion of the forecarriage directly to each other, wherein at least one of said first and second anchoring portions is subject to the roll movements of said two front wheels (10', 10 "), 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, characterized in that said first damper device comprises a kinematic connecting rod-crank (210, 220) which is connected respectively to said rod and to said first anchoring portion so as to define an articulated quadrilateral, and wherein said kinematic connecting rod-crank (210, 220) comprises a damper, and wherein said first damper device further comprises: - an actuator which is suitable to impart a shift movement to the kinematic connecting rod-crank (210, 220) so as to vary the configuration of said kinematic connecting rod-crank (210,220) between a damped rolling configuration, in which said crank is aligned with respect to a damping axis of said damper and said articulated quadrilateral is substantially degenerated into a triangle thus defining an extensible strut which counters the rotation of the rod within said predetermined angular range, and at least one free rolling configuration, wherein said crank is misaligned with respect to said damping axis and said articulated quadrilateral has a non-degenerate configuration, leaving the rolling movements free 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 second anchoring portion of the forecarriage directly to each other, wherein at least one of said first and second anchoring portions is subject to the roll movements of said two front wheels (10', 10 "), 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, characterized in that said first damper device comprises a kinematic connecting rod-crank (210, 220) which is connected respectively to said rod and to said first anchoring portion so as to define an articulated quadrilateral, and wherein said kinematic connecting rod-crank (210, 220) comprises a damper, and wherein said first damper device further comprises: - an actuator which is suitable to impart a shift movement to the kinematic connecting rod-crank (210, 220) so as to vary the configuration of said kinematic connecting rod-crank (210,220) between a damped rolling configuration, in which said crank is aligned with respect to a damping axis of said damper and said articulated quadrilateral is substantially degenerated into a triangle thus defining an extensible strut which counters the rotation of the rod within said predetermined angular range, and at least one free rolling configuration, wherein said crank is misaligned with respect to said damping axis and said articulated quadrilateral has a non-degenerate configuration, leaving the rolling movements free - an actuator which is suitable to impart a shift movement to the kinematic connecting rod-crank (210, 220) so as to vary the configuration of said kinematic connecting rod-crank (210,220) between a damped rolling configuration, in which said crank is aligned with respect to a damping axis of said damper and said articulated quadrilateral is substantially degenerated into a triangle thus defining an extensible strut which counters the rotation of the rod within said predetermined angular range, and at least one free rolling configuration, wherein said crank is misaligned with respect to said damping axis and said articulated quadrilateral has a non-degenerate configuration, leaving the rolling movements free