Biologic Joule 3 Dynamo Hub

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. Winner of a 2012 Eurobike Award

• 73 Percent generator efficiency - one of the most efficient
• One of the lowest drag of all dynamo hubs
• Ultra-compact, super-lightweight design
• German StVZO compliant (6V, 3W)
• 32-hole, 100 mm OLD, for both disc and non-disc brakes
• Weight (32-hole version): 416 g (14.7 oz)
• Available in silver or black
  

Occasionally, without notice, manufacturers change product design and/or specifications.