BioLogic Joule 3 Comp Rim Set – Dynamo Hub Wheel

4.5 out of 5 based on 2 customer ratings
(2 customer reviews)

$ 179.95$ 194.95 $ 149.95$ 184.95

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  • Best in class 73% generator efficiency
  • Custom Kinetix Comp rims for low weight and durability
  • German StVZO compliant
  • Compatible with standard dynamo hub powered lights such as the Tern Valo 2
  • Weighs only 853 g (20 inch)
  • Now available for 24 inch Tern bikes with V-brake (Black only)

The Joule 3 dynamo hub generates electricity while you ride to power lights or charge devices. The Joule 3, winner of a Eurobike Award, is one of the lightest, most efficient bicycle dynamo hubs on the market, which means more power generated at any given speed. The patented magnet configuration yields barely noticeable drag while a polished, laser etched, and precision-machined flange pattern deliver high performance in a beautiful, small package.

The Comp rim set uses best-in-class components to create a whole that sets a new standard in dynamo wheels. It features butted spokes and double-walled rims to create a light, yet strong and rigid wheel. Each wheel is individually hand-laced and trued.

With the Joule 3, you’ll never again worry about batteries for your evening rides – green power is always on tap when you need it.

For 20″ or 24″ wheel bicycles with V-brakes. Compatible with standard dynamo hub powered lights such as the Tern Valo 2. 20 inch wheels are available in silver and black. The 24 inch wheel is only available in black.


  • OLD: 74 mm (20 inch)/100mm (24 inch)
  • No. spoke holes: 20 (20 inch)/ 32 (24 inch)
  • Output: 6V, 3W (German StVZO compliant)
  • Weight: 20 inch = 853 g (w/o skewer)
  • Suitable tire widths: 20 mm (0.8″) — 35 mm (1.35″) for 20 inch


  • Joule 3 Dynamo Hub in 20″/24″ Comp rim set
  • Quick-release skewer
  • Cable connector
  • Product manual

Tire and inner tube not included.

2 reviews for BioLogic Joule 3 Comp Rim Set – Dynamo Hub Wheel

  1. 5 out of 5


    As of this date, I have been using this wheel for about four and a half years. Originally it was on another brand of folder powering a halogen light. After I got my Verge S11i, I got a Valo 2 light and transferred the wheel over. I’ve been very happy with the combination. The dynohub has no perceptible drag either with the light on or off. As Mophycal suggested above, I have been leaving the light on all the time.
    I have a fair amount of experience with Dahon dynohubs, and would wear them out after 2,000 miles or so. The Joule 3 has lasted over 4,000 miles and still turns smoothly. The Joule 3 is much more compact than the Dahon dynohub, so it almost doesn’t look like a dynohub. Another thing I appreciate about the Joule 3 is that it has a hollow axle, so it can be used with a quick release. Bolt-on hubs are OK, but the QR is more elegant and, should the tire go flat, it’s easier to change.
    I’m not looking forward to the hub wearing out, but when it does, I will see if the bearings can be replaced as I’ve been able to do with the Dahon hub. There’s no question in my mind that the Joule 3 is a better dynohub.

  2. 4 out of 5

    (verified owner):

    This hub is smooth small and good looking.
    Drag is so little than l imagined that I feel no need to switch the light off in the daytime.
    Very satisfied.

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