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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 08-06-10, 11:55 PM   #1
surfer
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Which bottom bracket for shimano hollowtech 2?

Ive got a FC-M760 and wondering which bottom bracket is compatible?
According to sheldons website "All Hollowtech II cranks work with all Hollowtech II bearing units"
Does that basically mean i can buy ANY BB for hollowtech2 and they will all fit ok???
such as BB70, FC4500, FC7800, BB6700 etc
The width is 68mm
thanks
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Old 08-07-10, 10:36 AM   #2
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Yes, they are all compatible.
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Old 08-07-10, 10:47 AM   #3
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The spindle of the BB is actually attached to the drive-side crank. The BB is now just the two cups screwed into the BB shell.

This system eliminates the need to match the appropriate BB spindle length to the crank to get the correct chainline; it's been taken care of for you.

I believe some Hollowtech II cranks are 68/73 compatible and some just 68mm. If your crank can handle 68 or 73mm, make sure you have the spacers that go between the cups and frame. The BB might come with them.
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