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  1. #1
    Senior Member squeegy200's Avatar
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    Truvativ ISIS BB - What tool to use?

    I have a Truvativ ISIS FireX MTB crankset and Bottom bracket. The BB supports both 68 & 73mm bb shells and is compatible with E-type Front Derailleurs.

    My question is, this BB lockring does not use conventional Shimano or Campy tools for installation/removal. It uses a Lockring with notches very similar to '97 XTR. However, the Truvativ lockring is a smaller 40mm diameter with 5mm square notches spaced every 15mm. It looks very similar to the '97 XTR or DuraAce lock ring but is not. I have the Park BBT-7 tool for the Shimano XTR and it does not fit. Park's only other tool seems to be the Hollowtech II lockring remover which is visably different.

    What tool is compatible with Truvativ ISIS Splined Bottom Bracket Lockrings?

  2. #2
    Senior Member sydney's Avatar
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    Truvative offers their own tool. Don't see another option listed in the QBP.

  3. #3
    Senior Member juicemouse's Avatar
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    Park BBT-8

    Beware that this specific tool does not have the standard 6-sided interface to accept a hex wrench or socket, it's got an 8-sided interface. You'll have to use an open-ended or an adjustable wrench. I didn't notice this before I bought mine. Maybe Truvativ's own is better?
    Last edited by juicemouse; 09-14-05 at 12:45 PM. Reason: additional info
    It is my belief that every person in this world has something to teach, and everything to learn.

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  4. #4
    Senior Member sydney's Avatar
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    Quote Originally Posted by juicemouse
    Park BBT-8

    Beware that this specific tool does not have the standard 6-sided interface to accept a hex wrench or socket, it's got an 8-sided interface. You'll have to use an open-ended or an adjustable wrench. I didn't notice this before I bought mine. Maybe Truvativ's own is better?
    None of mine acccept a hex either,but the ends take a square drive socket and the sides take a metric cresent wrench.

  5. #5
    I drink your MILKSHAKE Raiyn's Avatar
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