A wheel axle system for vehicles with a central tire pressure supply through a bore in the wheel axle. The invention includes a first wheel component removably coupled to a second wheel component, and a seal therebetween. The first wheel component includes a first mechanical valve, a coaxial circumferential groove, and an axial bore defined in the first component. The circumferential groove is located at a wheel side end of the axial bore. The second wheel component has a second mechanical valve, and a coaxial circumferential groove facing the circumferential groove of the first wheel component. The second mechanical valve co-acts with the first mechanical valve. The seal is interchangeable placed in the circumferential groove of the first and second wheel components, and acts as a coupling member between the first and second wheel components which revolve in relation to one another.