A track widening system for motor vehicles, having at least one track widening disc and at least one centering ring which is inserted into a central opening of the track widening disc. The centering ring has at least one first catch device which is arranged at the free end of a resilient arm and the track widening disc has a corresponding second catch. The centering ring may include plastic, and may be fiber-reinforced. One or more centering rings may have different colors. One or more protrusions may extend from a hub centering position of a centering ring.