A vehicle with 3 or more wheels includes at least two wheels aligned on the same axis. The vehicle has an intermediate centerline plane between the wheels parallel to a direction of movement, including a mass suspended in relation to the wheels defining a passenger or containment compartment, and two suspension groups kinematically connecting the suspended mass to the two aligned wheels. An anti-roll stabilizer device has at least one compensation mass kinematically connected to the suspended mass via a guide and movable in relation thereto. The anti-roll stabilizer device has a drive of the compensation mass to distance or bring the compensation mass closer to the centerline plane on the side opposite the displacement of a barycenter of the suspended mass with respect to the same centerline plane, to oppose the displacement with respect to the centerline plane of the position of the barycenter of the suspended mass.

A suspension mechanism has a tube member that is movably attached to an attachment shaft, a first attachment shaft retaining member provided on the chassis to swingably retain the attachment shaft with an outer peripheral surface of the tube member abutted on its inside surface, a shaft lower end portion of slip surface shape provided at lowermost part of the attachment shaft, a second attachment shaft retaining member provided on the chassis below the first attachment shaft retaining member and having a vertex equivalent section and a curve equivalent section to retain the attachment shaft with the slip surface shape shaft lower end portion abutted onto the vertex or curve equivalent section. The curve equivalent section is defined as a portion of a vertical cross section that passes through the vertex equivalent section is formed in an arc shape.

A suspension assembly includes a shock absorber arranged to damp linear motion of a piston portion relative to a surrounding cylinder portion. A lead screw is disposed within the shock absorber for conversion between linear kinetic energy and rotational kinetic energy. The suspension assembly also includes an electric motor displaced externally from the shock absorber, for conversion between rotational kinetic energy and electricity, and a transmission arrangement disposed outside the shock absorber, mediating between the shock absorber and the motor, and configured to transfer a resistance torque from the motor to the lead screw so as to modulate the damping of the linear motion.

A vehicle with 3 or more wheels includes at least two wheels aligned on the same axis. The vehicle has an intermediate centreline plane between the wheels parallel to a direction of movement, including a mass suspended in relation to the wheels defining a passenger or containment compartment, and two suspension groups kinematically connecting the suspended mass to the two aligned wheels. An anti-roll stabiliser device has at least one compensation mass kinematically connected to the suspended mass via a guide and movable in relation thereto. The anti-roll stabiliser device has a drive of the compensation mass to distance or bring the compensation mass closer to the centreline plane on the side opposite the displacement of a barycentre of the suspended mass with respect to the same centreline plane, to oppose the displacement with respect to the centreline plane of the position of the barycentre of the suspended mass.

A snowmobile including a chassis including a tunnel; a motor; at least one ski; an endless drive track; a rear suspension assembly including: a front suspension arm; a rear suspension arm; a pair of slide rails; a first rear shock absorber connected between the front suspension arm and the slide rails; and a second rear shock absorber connected between the rear suspension arm and the front suspension arm or the slide rails; at least one sensor for sensing an angular position of the front suspension arm or the rear suspension arm relative to one of the tunnel and a component of the rear suspension assembly near at least one of the front suspension arm and the rear suspension arm; and a controller communicatively connected to the sensor to receive electronic signals therefrom representative of the angular position.