EBB Help?- Mtbr.com
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Thread: EBB Help?

  1. #1
    mtbr member
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    EBB Help?

    Picked myself up a Gary Fisher Rig SS 29'er not to long ago and having a little trouble with the ecentric bottom bracket. I can loosen the bolt that holds it together, but the bracket does not get any looser. Had a little luck with hoping on the bike and pedaling up and down my hilly driveway a few times to get it loose, but that seems a little ridulous to have to do each time I need to tighten a chain for wear or switch out a rear cog.

    Any advice on how to loosen up the wedge short of riding the bike with a loose bolt or whacking it with a rubber mallet?



    "Go that way really fast. When something get's in your way, turn."

    - Booger

  2. #2
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    All I do is lossen the bolt and use a hammer and blunt punch that fits in the allen head to knock it loose. Make sure you have enough threads still in contact so you don't damage them. I loosen it, then run it down to where it just start to get tight, then back it off a few turns, tap it and see if it needs to be backed off more. Better to do it in a few steps than damage threads.

    There may be a better way!

  3. #3
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    my 09 has a flange-less chain ring bolt style insert that makes the tightening bolt work like a self extracting crank arm bolt (the top of the allen bolt hits the back of the insert and pushes against it)

  4. #4
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    I've tried that, but felt like I was hitting it too hard to be safe and it was still not working. It might just take a bit more patience.

    Glad to know at least someone else had the same idea!

    - MR

  5. #5
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    I have hit mine and felt like I was hitting it to hard and not getting anywhere, that is when I back the bolt off a little more. I try to keep as much thread in contact as possible for the initial hits.

  6. #6
    jason8265
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    make sure you loosen it up to the point it contacts the chain ring bolt style insert. Then back out further to force the wedge outward. I am guessing that you loosened it to the point it feels loose but not enough to hit the stop and force out the wedge.

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