Fothon Wheels 90mm

Inline skating wheels that due to a special spacer in the middle light up while you roll. Wheel quality is not affected. Really cool for skating in the dark.
The wheels emit light when you drive; a battery is not in it (and is not needed).
You hardly feel the magnetic resistance when you do a tour: the higher the speed, the smaller the relative resistance of the magnet. (This immediately also means that the wheels are slightly less suitable for slalom).
Because of the 82A durometer they have a lot of grip.