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  1. #1
    Muscle bike design spec robtown's Avatar
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    Bontragger Giga-X-Pipe Road Double Installation

    I just picked up a Bontragger crankset and realized it may need a specific BB. I've found a typical Shimano Ultegra BB but realize they may not be interchangeable. If not can anyone point me to a compatible BB? My Fuji frame is English 68

    Thanks

    edit - would the Trutativ x-pipe BB work?
    Last edited by robtown; 01-31-09 at 04:37 PM.
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  2. #2
    Senior Member marcusbandito's Avatar
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    The Bontrager cranks are made by Truvativ, so yes theire BB would work. The Shimano would not be compatable.

  3. #3
    Older than dirt CCrew's Avatar
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    Most of the Bontrager cranksets are ISIS, so an xPipe should work. which xPipe is going to be determined by your chainline. Should be a chart with your crankset for the measurements. It's not the same as the Ultegra Hollowtech BB, you're best sticking with a Truvative BB. Marcusbandito is right, almost all the Bontrager cranks are Truvatives. since it's 68/road it doesn't get ugly, I just put a Bontrager King Earl on my 29'er and that particular crank required a Truvative Howitzer BB.

  4. #4
    Muscle bike design spec robtown's Avatar
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    Quote Originally Posted by CCrew View Post
    Most of the Bontrager cranksets are ISIS, so an xPipe should work. which xPipe is going to be determined by your chainline. Should be a chart with your crankset for the measurements. It's not the same as the Ultegra Hollowtech BB, you're best sticking with a Truvative BB. Marcusbandito is right, almost all the Bontrager cranks are Truvatives. since it's 68/road it doesn't get ugly, I just put a Bontrager King Earl on my 29'er and that particular crank required a Truvative Howitzer BB.
    This is one where the axle is integrated with the drive side crank and the bearings are exterior. I'm hoping that means the bb or cups only come in one size
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    Older than dirt CCrew's Avatar
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    Quote Originally Posted by robtown View Post
    This is one where the axle is integrated with the drive side crank and the bearings are exterior. I'm hoping that means the bb or cups only come in one size
    Let's make this easier What crank are you working with and which Fuji frame? Since there are a lot of variations of crank designs these days it'll make it a bit easier..!

  6. #6
    Low car diet JiveTurkey's Avatar
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    The "X" in Giga X Pipe indicates the newer, external bottom bracket system. Older giga pipe (w/out the "x") was ISIS.

    OP: Just make sure the external bottom bracket you get is Truvativ for 68mm English threading. For example: http://www.jensonusa.com/store/produ...Cupset+06.aspx
    Quote Originally Posted by slopvehicle View Post
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    my brain hurts! fosmith's Avatar
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    truvativ cranks (bontrager) only work with truvativ GXP BBs. there's a difference in the NDS bearing. smaller ID with an inboard step.

  8. #8
    Muscle bike design spec robtown's Avatar
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    Quote Originally Posted by JiveTurkey View Post
    The "X" in Giga X Pipe indicates the newer, external bottom bracket system. Older giga pipe (w/out the "x") was ISIS.

    OP: Just make sure the external bottom bracket you get is Truvativ for 68mm English threading. For example: http://www.jensonusa.com/store/produ...Cupset+06.aspx
    Thanks I picked one up from BikeStop at the same price as jensonusa. It's the second external bearing setup I own but the first I'm assembling.
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  9. #9
    Low car diet JiveTurkey's Avatar
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    Quote Originally Posted by robtown View Post
    Thanks I picked one up from BikeStop at the same price as jensonusa. It's the second external bearing setup I own but the first I'm assembling.
    After installing the cups, if the integrated spindle does not slide through the the second (non-drive side) cup straight and easy, it's probably a good indication that the cups are not parallel to each other and your bottom bracket shell needs to be faced at the bike shop.
    Quote Originally Posted by slopvehicle View Post
    Not wearing a helmet makes me more aware of my surroundings. I find myself anticipating the hardness of concrete 50 or 100 feet in front of me, it's almost a zen-like connection between my face and the pavement.

  10. #10
    pmt
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    Quote Originally Posted by robtown View Post
    I just picked up a Bontragger crankset and realized it may need a specific BB. I've found a typical Shimano Ultegra BB but realize they may not be interchangeable. If not can anyone point me to a compatible BB? My Fuji frame is English 68
    You could use the Shimano, but you would need to add the shim from a GigaXPipe BB. Bike shop might have a few spares.

  11. #11
    Gear Combo Guru Chris_W's Avatar
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    You could also use a Hope external BB, which comes in a variety of colors (which the SRAM/Truvativ BBs don't), and with steel or ceramic bearings. You just need to use it with these converter rings to use a GXP crankset.

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