The Joule 3 is one of the lightest, most efficient bicycle dynamo hubs on the market. It can be built up to create super-light dynamo wheels and its patented magnet configuration yields barely noticeable drag. Polishing, laser etching, and a precision machined flange pattern give high performance in a beautiful small package. Available in disc and non-disc brake versions. Winner of a 2012 Eurobike Award.