Suspension system for a cabin of a land vehicle, preferably a road tractor, the suspension system comprising: - a frame, configured to be fixedly connected to a chassis of the land vehicle; - a first flange, located at a first transversal side of the suspension system and configured to be fixedly connected to the cabin, the first flange being mobile relative to the frame and defining a first absolute reference position relative to the frame; - a second flange, located at a second transversal side of the suspension system and configured to be fixedly connected to the cabin, the second flange being mobile relative to: ∘ the frame, the second flange defining a second absolute reference position relative to the frame, and ∘ the first flange, the second flange defining a relative reference position relative to the first flange; and - a core member, which is connected to the frame, by means of: ∘ a core joint of the suspension system, so that the core member is mobile relative to the frame only along a first degree of freedom and along a second degree of freedom, and ∘ a damper, applying an elastic return onto the core member relative to the frame, for bringing back the core member to a first degree reference position of the first degree of freedom and to a second degree reference position of the second degree of freedom, relative to the frame; wherein the respective positions of the first flange and of the second flange are mechanically linked to the position of the core member by means of a first rod and of a second rod of the suspension system, the first rod connecting the first flange to the core member and the second rod connecting the second flange to the core member, so that: - when the first flange is in the first absolute reference position and the second flange is in the second absolute reference position, the core member is in the first degree reference position and in the second degree reference position; - when the second flange is positioned away from the relative reference position relative to the first flange, the core member is positioned away from the first degree reference position; and - when the first flange is positioned away from the first absolute reference position, and/or when the second flange is positioned away from second the absolute reference position, the core member is positioned away from the second degree reference position. - a frame, configured to be fixedly connected to a chassis of the land vehicle; - a first flange, located at a first transversal side of the suspension system and configured to be fixedly connected to the cabin, the first flange being mobile relative to the frame and defining a first absolute reference position relative to the frame; - a second flange, located at a second transversal side of the suspension system and configured to be fixedly connected to the cabin, the second flange being mobile relative to: ∘ the frame, the second flange defining a second absolute reference position relative to the frame, and ∘ the first flange, the second flange defining a relative reference position relative to the first flange; and ∘ the frame, the second flange defining a second absolute reference position relative to the frame, and ∘ the first flange, the second flange defining a relative reference position relative to the first flange; and - a core member, which is connected to the frame, by means of: ∘ a core joint of the suspension system, so that the core member is mobile relative to the frame only along a first degree of freedom and along a second degree of freedom, and ∘ a damper, applying an elastic return onto the core member relative to the frame, for bringing back the core member to a first degree reference position of the first degree of freedom and to a second degree reference position of the second degree of freedom, relative to the frame; ∘ a core joint of the suspension system, so that the core member is mobile relative to the frame only along a first degree of freedom and along a second degree of freedom, and ∘ a damper, applying an elastic return onto the core member relative to the frame, for bringing back the core member to a first degree reference position of the first degree of freedom and to a second degree reference position of the second degree of freedom, relative to the frame; - when the first flange is in the first absolute reference position and the second flange is in the second absolute reference position, the core member is in the first degree reference position and in the second degree reference position; - when the second flange is positioned away from the relative reference position relative to the first flange, the core member is positioned away from the first degree reference position; and - when the first flange is positioned away from the first absolute reference position, and/or when the second flange is positioned away from second the absolute reference position, the core member is positioned away from the second degree reference position.