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Sooz
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103 Posts
Discussion Starter #1
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 :madman: From what I can research, it is the SRAM XX GXP crank that I need. I would appreciate it someone would confirm this.
 

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Sooz
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103 Posts
Discussion Starter #3
Please excuse my ignorance but what do you mean? My TopFuel has a BB90. What crank should I buy? GXP ?
 

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The joy of ski is Yours
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1,367 Posts
GXP applies to almost all SRAM BB - it's just a Seal configuration. If BB90 is supported, that's what you have to get; 90/92 is the BB Shell width and they have to drop in.


I just looked quickly at SRAM cranksets and BB30 is the only press-in I can find. The standalone GXP is threaded.
 

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Registered
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3,781 Posts
I already posted this in your cross post in General Discussion:
Yes, you need the GXP crankset. You will need the Trek BB for GXP.
http://forums.mtbr.com/trek/trek-bb90-gxp-problems-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)
 

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Sooz
Joined
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103 Posts
Discussion Starter #6
I already posted this in your cross post in General Discussion:
Yes, you need the GXP crankset. You will need the Trek BB for GXP.
http://forums.mtbr.com/trek/trek-bb90-gxp-problems-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 again Slash. I purchased the XX GXP crank and correct BB. Installed and riding now.
 
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