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  1. #1
    Senior Member superjoe95's Avatar
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    front derailleur question

    What are the differences between these 2? and which is better?


    One
    Two

    by the way i have an Alivo with top PULL(sorry) and the size is 34.9mm / 1 3/8'
    Last edited by superjoe95; 08-28-03 at 04:43 PM.

  2. #2
    NOT a weight weenie Hunter's Avatar
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    Te first XT der you linked to is a top swing der. The second one is a bottom swing der.

  3. #3
    NCAA - DUAL CHAMPIONS! a2psyklnut's Avatar
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    Yep, each one is designed to work for a specific application. Many full suspension bikes have limited areas in which to mount a bottom swing derailleur (TWO- either top or bottom pull), so they go to a top swing (ONE).

    If you've got a standard diamond shaped frame with a full length seattube, you can use either, but a bottom swing is usually best!

    L8R
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  4. #4
    Chi
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    Originally posted by a2psyklnut
    ... a bottom swing is usually best!
    Why's that?

  5. #5
    NCAA - DUAL CHAMPIONS! a2psyklnut's Avatar
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    The way the springs and linkages are set up it's a cleaner system. I guess really the differences are insignificant, but I've just always theorized that the bottom swing has a mechanical advantage. I could be wrong, (not the first time, not the last).

    L8R
    "Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
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  6. #6
    Chi
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    I've always wondered why the top swing models are more expensive. For example, the XTR FD961/962 is $60 vs. $90 for the bottom vs. top swing models respectively.

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