Dyno hub comparison

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06-01-17 | 04:53 AM

Dellphinus

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From: Illinois (near St. Louis)

Bikes: Specialized Expedition Sport, Surly LHT

Dyno hub comparison

Was reading thru a thread here on the new 100 Lux headlight, followed a link, to a link, etc. Somewhere, I can=m across a site that had comparisons of dyno hubs, that listed the added power needed for the various dynos, both with loads on and off. BUT I CAN'T FIND IT AGAIN! I've been thru my history, to no avail. Anyone know of this site, or another with similar info? IIRC, it listed one hub as adding three watts of drag with the headlamp on or off, and another going from 3 watts to 1 watt loaded to unloaded.
Anyone?

06-01-17 | 05:11 AM

znomit

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Heres a newish one:
How Much Does Dynamo Hub Drag Really Slow You Down? Lab Testing Results - CyclingAbout

And an oldish one:
https://veloweb.ca/resources/VBQgenerator.pdf

06-01-17 | 09:22 AM

noglider

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Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem

Great articles, [MENTION=68315]znomit[/MENTION]!

The first one confirms my decision to use dynamo hubs. I really like them. I'm a crazy bike collector, and I keep two of my bikes lightweight, but I have dynamos on the bikes I ride often.

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Please email me rather than PM'ing me. Thanks.

06-02-17 | 09:07 PM

Dellphinus

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From: Illinois (near St. Louis)

Bikes: Specialized Expedition Sport, Surly LHT

znomit, not the one I saw before, but same basic results! Thanks!

06-07-17 | 08:22 AM

edthesped

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I would have liked to see the PD-8X thrown in the mix. I have bikes equipped with PD-8 and a PD-8X hubs and notice drag on the PD-8X equipped bike much more than the PD-8 equipped bike. Enough so that I often wonder if there's an issue with the PD-8X hub. I know there's nothing scientific about it but when spinning both wheels by hand the PD-8 will spin several seconds longer than the PD-8X hub. Otherwise, I am a big fan of dynamo hubs...