An assembly comprising a tyre valve (2) and an enclosure (3), wherein the enclosure (3) is adapted to receive a gas pressure monitoring unit, wherein the enclosure (3) comprises a hinge joint, the hinge joint having at least one stationary member connected to the enclosure (3), an axle (6) and a rotatable member (4) arranged to at least partially rotate around the axle (6) and wherein the tyre valve (2) is connected to the rotatable member (5) of the hinge joint. The tyre valve (2) is connected to the rotatable member (4) of the hinge joint by a form-fitting connection which secures the tyre valve (2) against movement in a direction towards the rotatable member (4) and in a direction away from the rotatable member (5).