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  1. #1
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    trek 1000 double crank

    I just bought a bontrager(truvativ) 53/39 to put on my triple trek1000.I did not think about botom bracket width.Is this an issue? The Sheldon brown chart shows only one size square spindle for truvativ.
    Thanks in advance.

  2. #2
    <3s bikes Re-Cycle's Avatar
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    You need a longer BB.
    A wild man once explained to me how bicycles came from sailboats.

  3. #3
    Senior Member capwater's Avatar
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    Quote Originally Posted by Re-Cycle View Post
    You need a longer BB.
    Triple to double? BB will be shorter to move in the chainline.

  4. #4
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    For some reason I assumed I would need a shorter one as I am dropping one chainring
    Im a little confused?

  5. #5
    Senior Member capwater's Avatar
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    Triples need the longer BB axle, double need a shorter one. Now that's assuming you don't have outboard bearing cranks. What type of new crank DO you have? That will help in the discussion greatly.

  6. #6
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    The bike has a bontrager sport triple(trutaviv) And I bought the exact make in a double.

  7. #7
    Senior Member capwater's Avatar
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    Shimano UN-53, 68x107.

  8. #8
    <3s bikes Re-Cycle's Avatar
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    Ops 1K pardons, you guys are correct. Now awake, dog ate my homework...
    A wild man once explained to me how bicycles came from sailboats.

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