We think bicycle wheel-illuminating Revolights look really cool, but at $220, they're not cheap. Here's a DIY version that costs about $35 for each wheel. Instructables user Diyler uses reed magnet ...

Add Popular Science (opens in a new tab) More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results.

Bike lights nowadays come in a huge variety of designs, with all of them serving the same purpose: they increase the rider’s safety on the road. But that doesn’t mean we can’t come up with lighting ...