One-Year Review: Shimano DH-3N80 Dynohub- Mtbr.com
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  1. #1
    Ride Everything
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    One-Year Review: Shimano DH-3N80 Dynohub

    Posted here on my blog.
    GRAVELBIKE.COM - ride everything

  2. #2
    weirdo
    Reputation: rodar y rodar's Avatar
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    Yeah, nice system. I`ve been using a 3N70 and a 3N72 for about 3 years now (currently with a Cyo). I love mine. Like you, I originally kept a no-dyno wheel to swap back and forth, then noticed that I never bothered to swap in the no-dyno, so built another dyno wheel in order to swap between two sets of tires and always have my light. I leave my light on every time I ride- commutes, shopping, day rides, weekend tours, what ever.

    Gavel bike. Nice. I`ve pretty much stopped riding ST, but my favorite roads are still the unpaved ones- that picture at the top of your webpage is calling my name.

  3. #3
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    That does look nifty. Explain to me how the power actually gets from the spinning hub to the light. Rodar, what's an ST?

  4. #4
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    Quote Originally Posted by mtbxplorer View Post
    That does look nifty. Explain to me how the power actually gets from the spinning hub to the light. Rodar, what's an ST?
    AASHTA:
    Dynohubs

    Wikipedia:
    Hub dynamo - Wikipedia, the free encyclopedia
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  5. #5
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    hahahha I "knew" Sheldon, but had not seen the Monty Python bicycle repairman sketch on AASHTA Cycling is good for you: AASHTA

  6. #6
    weirdo
    Reputation: rodar y rodar's Avatar
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    ST for Single Track.
    Now what`s AASHTA?

    I didn`t see pics of it in MH`s links, but there`s a little plastic tab on the hub with two little contacts. A corresponding plastic clip at the end of the wire from the lights just pushes on, pull off to remove wheel. Shimano, SRAM, and Sanyo (who I think actually manufacture the other hubs also) all use the same little clips, which are the only trouble prone part of the system. If I remember, I`ll shoot and post post a pic in the morning.

  7. #7
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    I didn't know that acronym either, but I learned it's "As Always Sheldon Has The Answer"

  8. #8
    weirdo
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    Ah, yes! The Gospel according to Sheldon.

  9. #9
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    Anyone here using Suntour's version of the dynamo hub?
    Good friction shifting is getting hard to find nowadays....

  10. #10
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    I'm new to dynohubs. Do you have to use specific lights with these? How bright are said lights?

  11. #11
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    Quote Originally Posted by Straz85 View Post
    I'm new to dynohubs. Do you have to use specific lights with these? How bright are said lights?
    A good starting place is Peter White's site. See:

    headlight beams from Peter White Cycles
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  12. #12
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    Quote Originally Posted by Straz85 View Post
    I'm new to dynohubs. Do you have to use specific lights with these? How bright are said lights?
    Apologies to OP if this answer goes a bit OT. If we need a discussion of dynos in general anew thread would be best, but I think this one reply may be enough.

    I built this light:

    The one on the right for battery, and changed it for dyno use:



    Mounted on front of porteur style front rack.

    Uploaded with ImageShack.us


    and this voltage booster:



    The board is designed to go inside 1 1/8 steerer but I have a classic fork. The clear tube confirms no moisture, a big no-no.

    To use this dyno drum brake hub:



    Shown here with helmet light on return leg of ride out & back 1/4 mile "all guns blazing" tail light test:

    ImageShack® - Online Photo and Video Hosting

    Plenty of light for that bike. I purposefully left it a little hostile to too close an approach by oncoming traffic, as it works better in daylight 'to be seen' that way. It isn't as bad as a high beam on a car. I am guessing I am getting 5-600 lumens at speed.

    Building your own saves some cash but is very time consuming and I can only justify it in that the Schmidt triple LED light did not have the best LEDs and was meant for trail use only (unfriendly beam for road use). If I needed a dyno light, the Phillips would be my choice for a road light. If I was considering the Shimano hub I would also look at Velo-Orange's new switching hub which is reviewed under its manufacturer's name in the review blog below.

    Phillips Safe Ride vs B & M IQ Cyo RT:

    Quick notes on Philips SafeRide vs. B&M IQ CYO-RT

    A good review blog on current dyno hubs and lights:

    Bicycle lighting, in particular LED headlamps (headlights) with cutoff, and (hub) dynamos

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