The Luminous glowing wheels are LED wheels with phosphorescence.
This means that they also glow in the dark when the wheels are not turning (and so you will stay visible).
Two pictures alternately show the white glowing wheel in daylight and in the dark. The other picture shows the blue glowing wheel. In this case the reality is rather difficult to capture in photos. (To get the right diameter you should look at the title and not at the pictures.)
The spinning Luminous wheels are very nice because the LEDs in the wheel light up in an alternating way instead of all together.