Shimano XT Hollowtech- octalink - crank/bottom bracket question- Mtbr.com
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  1. #1
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    Shimano XT Hollowtech- octalink - crank/bottom bracket question

    So guys,

    I have these really nice XT cranks I'd like to run on my bike that has a 68mm bottom bracket shell. I acquired these recently along with three octalink shimano bottom brackets that are all 68x113mm spindle length.

    Problem is - the spindle length is too short for me to properly secure the non-drive side crank arm.

    So my question is:

    Should I go 68x118, or just be super safe/sure and go 68x121 spindle length?

    What say ye?

    Oh - and if anyone has any bbs in good condition that they'd like to trade, I'd happily consider some barter/trade scenarios.

    Thanks in advance!

    Cheers,

    Mark

  2. #2
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    118

  3. #3
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    Thanks Charlie!

  4. #4
    Basura Blanca
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    Mark, I've got a NIB Octalink BB in the bin at home, and it's either 113 or 118. I'll check tonight and PM you with the info, but if it's 118mm, it's yours for a heartfelt "Merry Christmas," as I've no use for it. TTYL,
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    You rock sir!!

  6. #6
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    Quote Originally Posted by MMcG View Post
    Problem is - the spindle length is too short for me to properly secure the non-drive side crank arm.
    What is the crank arm interfering with. If the crank is hitting the chain stay, then you need a longer spindle. If the crank is hitting the BB shell, then it's probably a 73mm shell.

  7. #7
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    Your non drive side arm is cranked on too tight.

  8. #8
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    How many spacers on each side?

  9. #9
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    Quote Originally Posted by Nomzat View Post
    How many spacers on each side?
    These are not the newer external bb cranks. However I'm running a set of Hones on the bike right now (would like them for a differnet project though) with two drive side spacers and one non drive side and everything is nice and secure.

  10. #10
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    I'm gonna say...

    Quote Originally Posted by MMcG View Post
    So guys,

    I have these really nice XT cranks I'd like to run on my bike that has a 68mm bottom bracket shell. I acquired these recently along with three octalink shimano bottom brackets that are all 68x113mm spindle length.

    Problem is - the spindle length is too short for me to properly secure the non-drive side crank arm.

    So my question is:

    Should I go 68x118, or just be super safe/sure and go 68x121 spindle length?

    What say ye?

    Oh - and if anyone has any bbs in good condition that they'd like to trade, I'd happily consider some barter/trade scenarios.

    Thanks in advance!

    Cheers,

    Mark
    118 as well.

    IIRC, the 121 was for the LX Octalink cranks that had slightly different offset. IIRC, they were the blue/grey finished ones.

    BTW, I have a stack of those BBs in my bin.

  11. #11
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    Got em working now! Love these XT cranks!


  12. #12
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    Nice!!
    Let me ask.Where do you get bottom bracket spacers and what are called?

  13. #13
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    they are called bottom bracket spacers. 2.5mm wide. it is usually made out of plastic but you can get them in aluminum too.

    cassette spacer fits well too as long as it is not splined.
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  14. #14
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    Quote Originally Posted by fishcreek View Post
    they are called bottom bracket spacers. 2.5mm wide. it is usually made out of plastic but you can get them in aluminum too.

    cassette spacer fits well too as long as it is not splined.
    Thanks and Happy Holidays.

  15. #15
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    Quote Originally Posted by MMcG View Post
    Got em working now! Love these XT cranks!
    Those look vaguely familiar. Glad they worked out for you.

  16. #16
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    Quote Originally Posted by TroutBum View Post
    Those look vaguely familiar. Glad they worked out for you.
    Yep they are gonna rock out big time on the bike!

    Thanks again and Merry Christmas to ya sir!!!

  17. #17
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    Just be glad you weren't trying to find an XTR BB (Octalink V1). They're pretty difficult to find. You can always go with the road BBs, but the spindle lengths aren't always exact. I needed a 116, and the Road Triple is 118. It worked, BTW.

    Glad you got them dialed in. Be real careful when first getting the splines aligned. You can destry the internal broach in the cranks pretty easily.

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