Mathmos Bike Wheel Lights
Circles of light as you cycle. Mathmos Bike Wheel Lights easily screw directly on to your bike wheel valves and create circles of light when you cycle.
The lights use high quality LEDs with light/motion sensors which mean that they will only come on at night when you’re on the move.
Besides being great fun they also promote safety by aiding visibility.
Should only be used in conjunction with standard bicycle lights and not just on their own.