Currently the industry’s lightest, most efficient bicycle dynamo hub on the market, the Joule 3 provides high performance in a beautiful small package. Its patented magnet configuration yields barely noticeable drag and the hub is available in disc and non-disc brake versions. The Joule 3 currently is the lightest, most efficient bicycle dynamo hub 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 at the link bellow.
