Credit: Photograph by Victor Prado

Safe and stylish, the Revolights City v2.0 revolutionize urban cycling by casting light directly from your wheels as you pedal to provide 360 degrees of visibility. Each spoke-mounted ring has 24 LEDs, but only the eight outward lights shine at once (their action is controlled by an integrated accelerometer) for a clear, consistent 280 lumens per wheel. And don't worry: If you lock your wheels, the system is virtually theft-proof. [$229; revolights.com]