The Joule 3 dynamo hub 20” rim set lets you generate electricity to power your lights or charge devices on your bike while riding. The Joule 3, winner of a 2012 Eurobike Award, is one of the lightest, most efficient bicycle dynamo hubs on the market, which means more power generated at a given speed. The patented magnet configuration yields barely noticeable drag while a polished, laser etched, and precision-machined flange pattern present high performance in a beautiful, small package.
The Comp rim set features butted spokes for lightness and is assembled and trued by hand. A double-walled rim provides extra stiffness and strength and a CNCed braking surface offers excellent stopping power.
Fits 20”-wheel bikes with V-brakes and a 74 mm OLD. Works with standard dynamo hub powered lights. Available in silver and black.