Head- and tail lights definitely help make bicycles visible from the front and back, but what about from the sides? The handlebar-plug-replacing SideLights are designed to address that shortcoming, ...
The Magicshine Evo 1700SD is a brilliantly integrated front light, with a great cutoff beam. If you don't already have your Di2 paired to your computer then it's a great idea, but if you do then go ...