Since the invention of the wheel, semi-truck rims have come a long way. From the wagon wheel to Dayton rims (also known as spider rims) to steel one-piece rims to now aluminum or alloy rims.
On Dayton style rims the spoke is mounted permanently to the vehicle. The spoke is not removed when the tire is changed. Tires are mounted on rims that slip over the spoke, and then are secured to the spoke by a special clamp or cleat.