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  1. #1
    Alfredo Contador |3iker's Avatar
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    BB tool 20-spline question

    Hi,
    I have a sealed shimano cartridge splined BB. Can a BB tool use to remove Octalink/Isis type be used? I saw on the Shimano tech doc it seems that the same tool (UN74S) to remove a UN26 can be used for a 105 Octalink type. Therefore I am thinking a splined sealed cartridge shares the same notch format as the Octalink/Isis BB. Please confirm. thanks!

    The BB tool in question is this
    http://www.filzer.com/products.php?id=40

    Last edited by |3iker; 12-01-10 at 11:09 PM.

  2. #2
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    The spline interface is the same but Octolink/ISIS spindles are wider than square taper spindles so some older tools designed for square taper won't fit over an Octolink/ISIS spindle.

  3. #3
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    Quote Originally Posted by Bezalel View Post
    The spline interface is the same but Octolink/ISIS spindles are wider than square taper spindles so some older tools designed for square taper won't fit over an Octolink/ISIS spindle.
    Right. Park Tool's first version of the BBT-2 tool wouldn't clear the larger diameter Octalink/ISIS spindles but they quickly revised it without changing the model number. The blister pack just had a yellow sticker saying it would fit the newer styles. The current BBT-22 works on all square taper and Octalink/ISIS cartridges.

  4. #4
    Alfredo Contador |3iker's Avatar
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    I see. So Octa/Isis tool should therefore automatically fit the square-tapered spline BB then because it is larger interior wise. Correct?

    thanks.

  5. #5
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    Quote Originally Posted by |3iker View Post
    I see. So Octa/Isis tool should therefore automatically fit the square-tapered spline BB then because it is larger interior wise. Correct?

    thanks.
    Yes, exactly.

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