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  1. #1
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    replace bottom bracket help. Shimano BC1.37 68 zb....what is that?

    I think I have most of this figured out. Its a shimano bottom bracket with 1.37 english treading and its shell width is 68mm. What does the zb stand for? What would be a modern replacement? My bottom bracket on my commuter blew out so I need a new one.

  2. #2
    dru
    dru is offline
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    You'll need to give us a lot more info than that if you want help. So far we know you have a 68 mm wide shell using English threading.

    What type of crank interface do you presently have?

    There's at least three types I can think of that Shimano uses.

    Square taper?

    Octalink (2 types)?

    External bearing?

    Of course there's ISIS from the other manufacturers too......


    Drew
    occasional cyclist

  3. #3
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    I figured it out some of it. The crank is a FC-751 which uses an octalink spline v2. That means I probably should go for a ES71 or ES70, right? I'm a little confused on chainlines. I am running a single speed cannondale with a flip-flop hub in the rear. What version of these BB's do I need and where can I find them?



    Last edited by computer; 05-09-2013 at 08:39 AM.

  4. #4
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    Your local shop can get whatever you need ,online stores ,ebay.take your choise don't forget you need the right tool to remove and replace it.

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