Thorn Cycles Forum
Technical => Lighting and Electronics => Topic started by: PH on October 04, 2025, 06:22:02 PM
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Spotted this while looking at something else. A bit of a departure from their other elegant looking hubs - ie it's ugly. Straight pull spokes and available in 24 and 32h options, coaxial socket rather than spade connectors, and a claimed higher output than the others. Looks like it's aimed at the adventure racers, but for most riders I doubt there's any significant advantage.
https://www.sjscycles.co.uk/hubs-front/son-29-s-6bolt-disc-dynamo-hub-12-x-100mm-black-24-hole-168/
EDIT - just been looking at the test results published by Cyclingabout, the numbers are impressive, I may have been wrong about the advantages, particularly for anyone wanting a charger, or even to have lights and charge at the same time.
https://www.cyclingabout.com/son-29-s-dynamo-hub-lab-test/
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Thanks for posting. I have not been keeping up on the latest in chargers for dynohubs since I bought a Cycle2Charge V3 in summer 2022. On my tour a year ago that charger with an SP PV8 hub easily kept my batteries all charged for two weeks. So, what I have is good enough. The Cycle2Charge V3 is an improvement over the Sinewave Revolution that I used to use for touring.
But I am pretty obsessive about minimizing my electric usage. While rolling, I usually run a flashing AAA powered taillight and a GPS. But the phone is off. Bike headlamp is off. Only using the hub to charge batteries.
I have no plans to buy any of the newer chargers or lights or hubs, but I do like to know what is out there. And there clearly are quite a few new ways to charge things.
It looks like the new chargers are putting out 5 watts at 20 km/hr.
https://fahrradzukunft.de/bilder/40/steckdose-unterwegs-10/19.gross.png
My Cycle2Charge at that speed puts out about 4 watts, the Sinewave Revolution about 3 watts. I bought the Cycle2Charge for the higher output rating. See attached.
Thanks again.
CORRECTION: My tour a year ago was with a Shimano DH-3N71 hub, that is what I have on my light touring bike, my other touring bikes have the SP dynohub.