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  1. #1
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    Bottom Bracket Help-

    I am looking at picking up a new Black 105 Crank. I do not understand the bottom brackets though. Can I order an Ultegra or Dura-Ace Bottom Bracket and it will work fine with the 105 crank or do I need to get the 105 BB? Are there some real advantages to buying one of the higher level BBs?

    This is a probably a very elementary question, but I appreciate your help.

    Thanks-

  2. #2
    A little North of Hell
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    DA, Ultegra or 105

    109.5mm
    [SIGPIC][/SIGPIC]
    XXXI

  3. #3
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    Thanks!

    So, whats the difference between the sealed cartridge types and the hollow ones? I am pretty certain I need the hollow type, just curious what the difference is?

    Also, I would need 68 which is English Threading, correct?

  4. #4
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    Quote Originally Posted by hokiesean24 View Post
    Thanks!

    So, whats the difference between the sealed cartridge types and the hollow ones? I am pretty certain I need the hollow type, just curious what the difference is?

    Also, I would need 68 which is English Threading, correct?
    68mm is the width of the bottom bracket shell for a standard English BB, so, correct.

    The bottom bracket type needs to match your crank. If it's the latest series 105 crank, you need the parts for the hollow spindle. A sealed cartridge BB is probably the older Octalink type, which is for a different crank.

    It's helpful if you include URL's when you're asking about compatibility. For instance, this crank:
    http://www.universalcycles.com/shopp...0&category=526
    takes this BB:
    http://www.universalcycles.com/shopp...4&category=347
    (or Ultegra or Dura-Ace)
    not this:
    http://www.universalcycles.com/shopp...7&category=347
    Jeff Wills

    All my bikes.

  5. #5
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    Thanks Jeff. Thats pretty much what I was thinking, I just wanted someone to confirm I was correct. I appreciate it!

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