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  1. #1
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    Air 9 Carbon EBB

    Just started building a new air 9 carbon but i was suprised the ebb fits so tight. I really have to twist to get it in the shell. It so tight it's taking the annodizing off the ebb. Are they supposed to be this tight. I have carbogrip ready to go but i really don't see how it will work considering how tight the EBB is. I am finding it impossible to tension the chain as well.

    Are the EBB's supposed to drop in the frame or are they really tight. It is a brand new frame that i waited over 2 months for.

  2. #2
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    haha I feel you, the tighter the better. With the carbo grip spray in there its a mess ebb becomes tough to tension like you said. I just try to line the chain up as best as possible with one crank on I've done it so many times I just know where the bolt should line up. Make sure its between 3 and 6..

    With all the issues I don't understand why Niner does not have a video on proper installation and a life time supply of carbo grip.

  3. #3
    i don't give a shift
    Reputation: collideous's Avatar
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    If it's that tight already don't use Carbogrip. You'll have a heck of a time if you need to readjust chain tension or take it apart. Grease the sucker instead. Are both sides tight? On the 3 frames I went through I found the drive side tight and the non-drive side with play. From personal experience, I'd throw the original EBB on Ebay and get a Bushnell.
    blogging at 29in.ch

  4. #4
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    Both sides are super tight. I have been looking at the bushnell and that is plan b.

  5. #5
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    Busnell...should be Plan A.......Don't put yourself through the headache of the Biocentric

  6. #6
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    I called niner and the EBB is way to tight. It sould spin by hand once installed. Looks like it is going to be a frame repacement as the shell is not perfectly round. Seems to me that the bushnell would not depend on the shell being perfect.

  7. #7
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    Quote Originally Posted by npc2396 View Post
    I called niner and the EBB is way to tight. It sould spin by hand once installed. Looks like it is going to be a frame repacement as the shell is not perfectly round. Seems to me that the bushnell would not depend on the shell being perfect.
    Spin by hand I agree but once u apply the carbo grip the ebb doesnt spin so its hard to tension the chain. That stuff is so tacky like glue... So when it comes time to switch cogs u are stuck with a hot mess. You have to take apart the crank,bb,ebb and clean all the goo off its freaking horrible I will never get another Niner.

  8. #8
    i don't give a shift
    Reputation: collideous's Avatar
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    Quote Originally Posted by npc2396 View Post
    I called niner and the EBB is way to tight. It sould spin by hand once installed. Looks like it is going to be a frame repacement as the shell is not perfectly round. Seems to me that the bushnell would not depend on the shell being perfect.
    I can confirm that. My shell is quite oval as well, more so on the drive-side. I had creaking issues until I switched to a Bushnell. The Bushnell works fine despite the oval BB shell.
    blogging at 29in.ch

  9. #9
    wnymba-imba ~VP
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    oddly enough, i had a similar issue with my air9c. i originally set it up for SS and out of 2 other one9's that was the tightest of the 3 bikes. that ebb was in there solid.
    www.wnymba.org
    Building trails and keeping them open...

    Niner Air9C

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