Joule™ HG On/Off Dynamo Hub

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The Joule HG On/Off dynamo hub is a bicycle dynamo hub that features a switch on the side that can be rotated “on” or “off”. In the “on” position, the Joule HG is one of the most efficient hubs on the market. In the “off” position, the magnets are pulled away from the core of the hub so that there’s practically zero extra drag. Compatible with the ReeCharge Dynamo Kit and Power Pack and standard dynamo lighting options.

  • Dynamo can be switched completely off, practically eliminating all drag
  • CNC-finished 6061 aluminum housing
  • High generator efficiency
  • 100 OLD, 32-hole
  • Works with both disc and non-disc brakes
  • Output: 6V, 2.4W