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  1. #1
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    Help converting from Shimano Dura-Ace crank and BB to compact FSA crank and BB

    Recently-purchased used Argon 18 Platinum

    I want to remove the crank/bottom-bracket I have (Shimano 7700 53-39Teeth) and replace it with an FSA compact crank I have.

    I don't know much about different bottom brackets. There are so amny types/widths. I don't even know what type of BB my FSA crank uses (bought it at bike-club swap-meet).

    My questions:
    - Can I even use the FSA crank in this frame?
    - If so, what BB should I buy?
    - What BB hardware will I need (or does it come with the BB)?
    - What tool(s) should I buy (or should I have this done at a LBS?)

    I have nothing against going to a LBS, I just like to work on my own stuff.

    What I have:

    It look like the overall length of the BB I have is 110mm, and about 17.5 mm protrudes out of the drive-side.


    I have NO idea how you can get a crank to look this bad.



    If you look closely in the pics, you can see that the previous owner of this bike must have used pliers on this bottom-bracket

    What I want to install:



  2. #2
    cab horn
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    1) Those FSA cranks will work.
    2) They take they're ISIS comatible BB. A model which is certain to be compatible with your frame.
    3) The length is determined by the model of that crank, which you then look up.
    4) ISIS cranks/bb's are beginning to be orphaned since the introduction of external BB's.
    5) The shimano BB is removed by any shimano 20 tooth spline compatible tool, e.g Park BBT-22.

    I'm going to caution you with replacing outdated 9 speed systems with more outdated FSA crank/bb systems.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  3. #3
    AEO
    AEO is offline
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    the ISIS BB and shimano octalink use the same 20 spline tool to be installed and removed.

    I would second operator's opinion of replacing outdated octalink system with an obsolete and out of production ISIS system..
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
    http://sanfrancisco.ibtimes.com/arti...ger-photos.htm

  4. #4
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    Out-of-production?

  5. #5
    coprolite fietsbob's Avatar
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    Octalink is apples, Isis is oranges,
    pull the BB out of the frame and pack it up with the crankset.in a box.
    look for an ISIS BB to suit your other crankset. Good Luck.

  6. #6
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    Quote Originally Posted by fietsbob View Post
    ...Look for an ISIS BB to suit your other crankset....
    That's what this thread is all about.

    While I appreciate the advice of the people warning me away from ISIS, it is what I already own.

    So... getting back to Question #2 (what BB should I buy?). I looked on FSA's website, and found no specs on this crankset. I see websites selling 68 X 108mm English ISIS BBs. Is that what I need?

  7. #7
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    Here's the BB I bought:

    VP 68x108 BOTTOM BRACKET ISIS ,198g


    When it shows up, I'll find out what I need next (maybe different front derailleur).

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