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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

  2. #2
    Senior Member d2create's Avatar
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    Apr 2003
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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 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.
    2008 Rivendell A. Homer Hilsen
    Pics and Specs Here!

    2010 Specialized Rockhopper 29er

  3. #3
    Senior Member miamijim's Avatar
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    Aug 2003
    Tampa, Florida
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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: 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.

    WWW.CYCLESPEUGEOT.COM 1984 Schwinn Paramount; 1987 Schwinn Paramount; 1975 Tom Ritchey, 198X Vitus

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