A device for the height adjustment of a high-performance road vehicle; the device being configured to be at least partially interposed between a frame and a suspension of the road vehicle and to allow the vehicle to shift from a road configuration to a race configuration and vice versa; the device comprising: a base body comprising a first end, which can mechanically be connected to the frame of the road vehicle; a first mass, which is connected to the base body so as to be movable along a sliding axis and is capable of assuming at least a first position in the road configuration and a second position in the race configuration; wherein the first movable mass comprises a plate, which is configured to at least partially compress a main elastic element of the suspension; a second mass, which is connected to the first mass so as to be movable along the sliding axis as well and is capable of assuming at least a third position in the road configuration and a fourth position in the race configuration; wherein the second movable mass comprises a second end, which is opposite the first end and is configured to be connected to a suspension of the road vehicle and to change the stroke of the suspension depending on the position of the second movable mass; wherein the second movable mass is configured to at least partially move in an opposite direction relative to the first movable mass; the device being characterized in that the second movable mass is forced to slide along the sliding axis between a third limit stop element (LS") and a fourth limit stop element (LS′′′); wherein the third limit stop element is integral to the base body and the fourth limit stop element is integral to the first movable mass; the second movable mass is in contact with the third and the fourth limit stop element, respectively, in the third and in the fourth position. a base body comprising a first end, which can mechanically be connected to the frame of the road vehicle; a first mass, which is connected to the base body so as to be movable along a sliding axis and is capable of assuming at least a first position in the road configuration and a second position in the race configuration; wherein the first movable mass comprises a plate, which is configured to at least partially compress a main elastic element of the suspension; a second mass, which is connected to the first mass so as to be movable along the sliding axis as well and is capable of assuming at least a third position in the road configuration and a fourth position in the race configuration; wherein the second movable mass comprises a second end, which is opposite the first end and is configured to be connected to a suspension of the road vehicle and to change the stroke of the suspension depending on the position of the second movable mass; wherein the second movable mass is configured to at least partially move in an opposite direction relative to the first movable mass; the device being characterized in that the second movable mass is forced to slide along the sliding axis between a third limit stop element (LS") and a fourth limit stop element (LS′′′); wherein the third limit stop element is integral to the base body and the fourth limit stop element is integral to the first movable mass; the second movable mass is in contact with the third and the fourth limit stop element, respectively, in the third and in the fourth position.