Have you ever travelled in a tight pack of riders at night and had someone bump your rear wheel when you slow down? I have, it isn’t much fun. I’ve also regularly wished I had a way of letting cars know I am about to slow down without using a hand signal that they may or may not understand. Revolights, the company that bought us the fully visible wheel lighting system, reckon it has come up with a solution. The Revolights Arc is a mudguard mounted light that can detect when your wheel is slowing down, and indicates this to folk travelling behind you by changing intensity.
The light is designed to give maximum visibility from both the rear and sides of your bike, providing far more light than a traditional seat post mounted one. It has a USB rechargeable Li-Poly battery and two modes: blinking and solid.
The really revolutionary feature of this light is a sensor that detects the speed of your wheel and changes the light output when you start slowing down. If the light is in solid mode it will get brighter to indicate you are braking, if it is in the blinking mode it will blink faster.
Buying the light at a standalone unit will cost you from US$69 (early bird price) and it will mount to your existing mudguard. If you don’t have a rear mudguard you can buy it pre-mounted on a plastic (US$109) or metal (US$129) one. If you get the light pre-installed on a mudguard it is riveted on, making it very difficult to steal without removing the entire wheel.
To support the project, get yourself a light, or find out more head to the Revolights Arc Kickstarter campaign.