In one embodiment, the present invention is a plasma disk assembly connectable to a vehicle's wheel assembly, the plasma disk assembly comprising a plasma disk assembly having a sealed plasma disk display encapsulating ionizable gas, at least one controllable power source for producing an output sufficient to ionize the gas in the plasma discharge tube and operably connected to the power supply for optionally adjusting the level of the energy to cause selective ionization of the gas in the plasma display to occur in differing amounts as a function of a changing stimulus connected to an input, at least one ball bearing system or mount, electrical connectors connecting the power source to the plasma disk, at least one pair of electrodes electrically coupling the electrical connectors to the ionizable gas in the plasma discharge tube, and at least one ballast system.