SRAM XX BB30 or GXP for BB90 BB ???- Mtbr.com
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  1. #1
    Sooz
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    SRAM XX BB30 or GXP for BB90 BB ???

    I have a Trek TopFuel 2011 9.9 with a BB90 BB (bearings installed in frame). I recently purchased a SRAM XX BB30 crank off eBay and have since discovered the BB30 will not fit in my frame From what I can research, it is the SRAM XX GXP crank that I need. I would appreciate it someone would confirm this.

  2. #2
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    Yes, you need the GXP crankset. You will need the Trek BB for GXP.
    http://forums.mtbr.com/trek/trek-bb9...ms-776481.html

    Make sure you research this - looks like the Top Fuel takes a special BB, something about a narrow Q-factor. The Enduro page has a warning:
    FRAMES THIS KIT WILL NOT FIT:
    --Trek mountain frames with BB90 bottom bracket shells.
    (Top Fuel Carbon and Hardtail Carbon)

  3. #3
    The joy of ski is Yours
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    IMO this batch of BB experimentation is nothing outside of a disaster for Mountain Bikes. There's even a BB with 1/2 of a mm as a standard - 89.5mm. Unless that's just been called BB90, but really - 68/73mmm and 83mm is what goes the distance, new and used.
    I like Sand - I don't like Witches


  4. #4
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    Put a mountain biker in a room with 2 bowling balls and we'll break one and lose the other - GelatiCruiser

  5. #5
    Sooz
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    Quote Originally Posted by Slash5 View Post
    Yes, you need the GXP crankset. You will need the Trek BB for GXP.
    http://forums.mtbr.com/trek/trek-bb9...ms-776481.html

    Make sure you research this - looks like the Top Fuel takes a special BB, something about a narrow Q-factor. The Enduro page has a warning:
    FRAMES THIS KIT WILL NOT FIT:
    --Trek mountain frames with BB90 bottom bracket shells.
    (Top Fuel Carbon and Hardtail Carbon)
    Thanks Slash. I ordered a SRAM XX GXP crank and the correct Trek BB for GXP. All done now and back on the trail. Thank-you.

  6. #6
    Sooz
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    I am not sure what you mean.

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