Rotation of a wheel assembly having phosphorescent pigments of differing visages creates a visual effect, such as a flashing or strobing appearance, not seen while the wheel is stationary. The arrangement of multiple visages of phosphorescent pigment may be within a single band or other shape or multiple bands or shapes on the same wheel assembly. This effect is created by varying the color, tone, color saturation, and/or pigment brightness of the phosphorescent material, along the side(s) of the wheel assembly. While the phosphorescent material is charged and glowing, and the wheel assembly rotates, the different visages will appear to the human eye to visually overlap. With this effect, the wheel assembly is given a strobing, flashing, or vibrating appearance. Other approaches, including different colors of phosphorescent material on the front and rear wheels, are also disclosed for enhancing visibility.