The Foresite HS Headset Spacer Light is a dusk/day running light that smartly integrates into your bike's steerer tube.
Twin white LEDs operate in steady or flashing modes for up to 100 hours on two CR2032 button batteries. Constructed of durable nylon and plush silicone, the Foresite HS is weather resistant, and easy to operate. Replaces 30mm integrated headset cone spacer for 46~47mm OD headtubes. Must be installed by professional bicycle mechanic