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, wherein the centering ring has at least one catch device which is arranged at the free end of a resilient arm and wherein the track widening disc has at least one corresponding catch device. The centering ring may be plastic, and may be fiber-reinforced. One or more centering rings may have different colors.