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Thread: Internal hub ?

  1. #1
    There's time now icedmocha's Avatar
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    Internal hub ?

    Specifically a shimano nexxus 8 hub. Do I need horizontal dropouts, and if not do I need a special tensioner? tia

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    Senior Member d2create's Avatar
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    You need horizontal dropouts, OR a chain tensioner, OR you need to find that perfect front chainring/rear sprocket combination for the correct chain tension, OR buy a frame from http://steelwoolbicycles.ca/ with an eccentric bottom bracket shell.

    Basically an internal hub is the same as a single speed bicycle in setup.
    See what Sheldon has to say about single speeds and fixed gear.
    http://sheldonbrown.com/singlespeed.html
    2008 Rivendell A. Homer Hilsen
    Pics and Specs Here!

    2010 Specialized Rockhopper 29er

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    Senior Member miamijim's Avatar
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    A Shimano Nexus 8-speed hub will work on a vertical dropout bike. Its not as simple as saying, 'its the same as a single speed hub'. Various components of the hub need to 'indexed' or 'aligned' to properly function. Verticlal dropouts vs. horizontal vs. reverse dropouts all poistion the mechanisms in a different orientation.

    To account for these differences Shimano provides a variety of 'ant-turn' washers, which in turn properly orient the hub various mechanisms.

    Refer to this link: http://bike.shimano.com/media/techdo...9830600211.pdf for installation instruction including washer descriptions.

    With vertical dropouts, as d2create mentioned, you'll either need:

    1. That magical tooth combination or
    2. A chain tensioner.

    That being said, I have 4-speed Nexus 'freewheel' setup and cant say enough about it.

    Jim
    WWW.CYCLESPEUGEOT.COM 2005 Pinarello Dogma; 1991 Paramount PDG 70 Mtb; 1976? AD Vent Noir; 1989 LeMond Maillot Juane F&F; 1993? Basso GAP F&F; 1989 Terry Symmetry; 2003 Trek 4700 Mtb; 1983 Vitus 979

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