Bb90 to bb86
#3
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Joined: Aug 2014
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Nope. maybe I don't know how to ask. I want to move the ultegra 6800 from my domane 4.5 to my cyclocross bike and want to know if there will be a problem because they have different bottom bracket standards.
#4
SE Wis

Joined: Apr 2005
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From: Milwaukee, WI
Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400, 2013 Novara Randonee, 1990 Trek 970
#6
Francophile

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I got curious and had to go do a little research on the 'net for this one! From what I can tell, the difference is that the BB 90 standard has bearings that are inside the BB shell. The BB 86 standard puts the bearings outside the shell. Otherwise, things are the same. So, it seems to me that you could put the crank and its axle from one bike into the other bike without changing anything else.
It is worth a try at least!
It is worth a try at least!
#8
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From: Portland OR
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Isn't there a 4 mm difference in width of the bottom bracket shell. Not sure if this would be a problem for the crank.
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thehammerdog
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