Abstract: An oscillator or spinner assembly includes an accessory mount configured for securing to the lugs of a wheel. A removable decorative oscillator is mounted to the accessory mount using mounting bolts. A bearing assembly is provided to facilitate rotation of the oscillator. Weights may be affixed to various portions of the oscillator to achieve desired rotational effects. By securing the oscillator assembly to a wheel using the wheel's lugs, it is unnecessary to remove wheels for installing and removing the oscillator assembly. Additionally, the oscillator or spinner may be readily changed without requiring removal of the wheels. Furthermore, the decorative oscillator or spinner may readily be changed without removal of the wheel and without removal of the entire assembly.