Sometimes is the simple things that can make a huge impact. We just had our minds blown by the Ilumenox Nano, a $12 light designed to alert other cyclists when you’re applying your brakes. The Nano mounts directly to your brake line and uses a spring clip that turns on the light as the brake lever is pulled.  It’s quick and easy to attach to most cable-actuated rim brake. We set one up with a road caliper, cantilever, and V-brake with good results. They’re now in stock. Get one before your next ride.