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  1. #1
    RFC
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    Advice please re dynamo bottle systems

    These dynamo threads always get me interested.

    I am thinking about trying a bottle dynamo system.

    What would you recommend as a set up?

    What about the Spanninga Wave Dynamo?

    Thanks

  2. #2
    Randomhead
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    I don't have one, and probably never will. BUt the Spanninga seem like a good choice. My experience with bottle dynos is pretty good, when I did use one I always used a tire on the dyno wheel because it reduces noise and bike tire wear.

  3. #3
    Thunder Whisperer no1mad's Avatar
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    I've got a question about the bottle dyno as well. Tire wear was mentioned in the previous post and I'm wondering just how quickly one of these things wear down a tire?

  4. #4
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    I heard good things about Axa HR. I keep one as a back-up, but have not managed to test it out yet. Unless you were using a wire-brush on top of a roller, you should not need to worry about the tire wear, with the tire wearing out first from working against the road.

  5. #5
    Senior Member CaptCarrot's Avatar
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    Tyre wear should not be an issue, but it does pay to have tyre sidewalls that are designed for use with a bottle dynamo - otherwise excess pressure may be required to reduce slippage and increases drag.

    It has been a long time since I have used a bottle dynamo, and TBH since I have used a hub dynamo I will NEVER go back to bottle.

    I goy a Shimano Alfine dyno-hub for ~50 GBP, new spokes for ~30 GBP and fitted for ~20 GBP, so a grand total of about 100 GBP. You can pick up a nexus dyno hub for ~25 GBP, normal spokes (I went for very specific spokes) will probably set you back ~15 GBP - which drops it down to about 60 GBP - of course, you can always look for a prebuilt wheel to give you the option of no dynamo as well if you prefer.

    Don't get me wrong, bottle dyno's are OK, I would even go so far as to say good - but hub dyno's are much better.

    Just my $0.02
    Not as green as I might be cabbage looking!

  6. #6
    Thunder Whisperer no1mad's Avatar
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    So tire wear apparently isn't a big of a concern with the sidewall dyno's as I thought. However, I do perceive another potential problem. Should the wheel come out of true, then the contact point will be either closer or further away.

  7. #7
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    If you ride at night a lot, a dynamo hub is definitely the way to go.

    But bottle dynamos definitely fill their niche, and they do it well.
    Last edited by christ0ph; 12-31-11 at 12:46 PM.

  8. #8
    Randomhead
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    Quote Originally Posted by no1mad View Post
    So tire wear apparently isn't a big of a concern with the sidewall dyno's as I thought. However, I do perceive another potential problem. Should the wheel come out of true, then the contact point will be either closer or further away.
    get a better wheelbuilder?
    Any bottle dyno worth having has a spring that will accommodate some tire/wheel wobble. I probably wouldn't put a bottle dyno on something like a Conti gatorskin because there is effectively no rubber on the sidewall. Although I usually ran mine on the tread anyway.

  9. #9
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    Where do you like to mount yours?

    Quote Originally Posted by unterhausen View Post
    Although I usually ran mine on the tread anyway.

  10. #10
    Randomhead
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    I always used fork mounted dynamos. Up far enough on the fork that they ran on the tread, but not too far up.

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