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Need help finding a dynamo equivalent to my current set-up

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Need help finding a dynamo equivalent to my current set-up

Old 04-16-17, 12:59 PM
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mornview
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Need help finding a dynamo equivalent to my current set-up

I have been running a 305 lumen USB-rechargable front light (the Serfas 305, to be exact) for a number of years and have been happy with the light it provides, but I would really like to make the jump to a dynamo light. I know that lumens cannot necessarily be translated to lux, but I'm hoping someone could recommend me a dynamo light that would be comparable to a 300 lumen front light? And a dynamo front hub to go with it? I'm mainly asking because it would appear the market skews towards really cheap or really expensive; I just want something to meet my needs, nothing more.

Thanks!
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Old 04-16-17, 08:16 PM
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I've done some research on this and am planning on a Son 28 hub with B&M lighting. The Son 28 hub would/will be my choice based on personal recommends from some wrenchers and public reviews. I'm leaning to B&M based on reviews - I'm a bit prejudiced, they're German-made and that equates to reliability for me.
You can (probably) go cheaper on both components, I know I'll be paying a premium for both those but I'll pay for the build quality and reliability. Worth it? Hope I never need to find out...
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Old 04-16-17, 09:46 PM
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This Cyo model is probably the best bet on a budget.
https://www.rosebikes.com/article/b-...amp/aid:709237
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Old 04-17-17, 10:45 AM
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Yeah, even before posting this thread my research had led me to believe the B&M Cyo T was going to be the way to go. Would it be possible to power this light with a bottle/sidewall generator? If so, which one would you recommend? I feel like a sidewall generator would better suit my needs if it would work for this light.
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Old 04-17-17, 12:53 PM
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I don't recommend sidewall dynamos, I used a B&M one for about a year and it would always slip in the rain and snow and if knocked out of adjustment would wear out it's rubber roller in about a minute. They also seemed to generate considerable resistance when on, even with an LED light.
These days with budget dyno hub wheels going for less than $100, I just don't see any benefit in a sidewall dynamo. Even running two LED headlights and a tail light off my Shimano dynohub wheel, I really don't feel any added resistance. Not much more expensive than a sidewall and maybe less if you have to add mounting accessories to your bike to make the sidewall dynamo work.
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Old 04-17-17, 06:54 PM
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Originally Posted by randomgear View Post
I don't recommend sidewall dynamos, I used a B&M one for about a year and it would always slip in the rain and snow and if knocked out of adjustment would wear out it's rubber roller in about a minute. They also seemed to generate considerable resistance when on, even with an LED light.
These days with budget dyno hub wheels going for less than $100, I just don't see any benefit in a sidewall dynamo. Even running two LED headlights and a tail light off my Shimano dynohub wheel, I really don't feel any added resistance. Not much more expensive than a sidewall and maybe less if you have to add mounting accessories to your bike to make the sidewall dynamo work.

I'm planning on using a dynamo hub at least for my winter commuter. For my spring/summer/fall commuter a sidewall dynamo seems to make a lot of sense, but I'll need to weigh the pros against the cons. Which Shimano dynamo are you using?
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Old 04-17-17, 09:56 PM
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Originally Posted by mornview View Post
I'm planning on using a dynamo hub at least for my winter commuter. For my spring/summer/fall commuter a sidewall dynamo seems to make a lot of sense, but I'll need to weigh the pros against the cons. Which Shimano dynamo are you using?
Mine is a DH 3N72, it's about 8 years old and works just fine.

If your winter commuter has the same wheel size as your normal commuter, then just switch out the wheels seasonally. If they are different, then that's a problem.


edit, says so right on the hub. Shoulda thought to look there first.

Last edited by randomgear; 04-17-17 at 10:08 PM.
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Old 04-18-17, 01:19 PM
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Originally Posted by mornview View Post
I'm planning on using a dynamo hub at least for my winter commuter. For my spring/summer/fall commuter a sidewall dynamo seems to make a lot of sense, but I'll need to weigh the pros against the cons.
If you've got a good hub dynamo like the SON, the drag is approximately negligible. Ride it all year.
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Old 04-18-17, 07:42 PM
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My commute is around 7 miles, and I just use my dynos all year. Don't see any reason not to. I use the cheap Sanyo dynohubs. I'm sure it has a little drag, but I don't notice.
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Old 04-19-17, 11:35 AM
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You can use either kind of dynamo with dynamo lights, either a hub or a bottle. The bottle has three advantages: cost, ease of installation, and weight. But the drag is truly a drag. It's also noisy. And as mentioned above, they get knocked out of alignment. I use a bottle dynamo on one bike that is there just for unexpected night riding.

I've had perfect service from my Sanyo hub, which is the cheapest available. The Shimano is probably the best balance between quality (including the drag) and price. Then again, the SP hubs are gorgeous, and I believe they make even less drag. On the bikes that have dynamo hubs, I leave the lights running all the time since I can't feel the drag, and there's a small chance that the lights enhance my safety.

Dynamo headlights definitely put out less light than the nice battery lights. But the shaped beam makes up for that for some people. No guarantees, though, because they are too dim for some people, especially those who go very fast in total darkness. B&M lights have very cleverly engineered optics to put light where you need it and keep it away from where you don't need it.
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Old 04-21-17, 09:17 AM
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Shimano Dyno hubs are cheap now, under $80 for the top-of-the-line Alfine:
https://www.universalcycles.com/shop...?category=5574
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Old 04-24-17, 06:31 AM
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Sorry for the late reply; life got hectic for a bit.

Anyways, thank you all for your input. I know this is a subject that gets beat to death here, but somehow I just could not answer my question by digging through the archives, so I appreciate everyone's patience. I've decided to start out with the Sanyo hub and the B&M light. Thanks again for making this process much easier than it would've been on my own!
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Old 04-24-17, 10:14 AM
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Originally Posted by mornview View Post
Sorry for the late reply; life got hectic for a bit.

Anyways, thank you all for your input. I know this is a subject that gets beat to death here, but somehow I just could not answer my question by digging through the archives, so I appreciate everyone's patience. I've decided to start out with the Sanyo hub and the B&M light. Thanks again for making this process much easier than it would've been on my own!
Please let us know how all of this works out, and please include pictures. That's the price you pay for such lovely free advice.
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Old 04-25-17, 07:16 PM
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I have the Cyo Premium and I wouldn't trade it in for anything else, except for maybe their new light. It is plenty bright for me.
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Old 04-28-17, 07:40 PM
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Originally Posted by noglider View Post
Please let us know how all of this works out, and please include pictures. That's the price you pay for such lovely free advice.
Will do! You don't have to ask me twice to post pictures of my builds. I'm hoping to have the whole build finished some time next week; pictures will follow.
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