Specialized carbon crank on BBright?

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dalex

Post subject: Specialized carbon crank on BBright?

Posted: Wed Dec 05, 2012 11:00 am

Joined: Fri May 25, 2012 12:05 pm
Posts: 15

Putting a Specialized Fact carbon crank on a BBright frame - is this possible? My guess is not, but I have searched and not found a verification. Perhaps it could be done with a Lightning BBright bottom bracket? FWIW I'm looking at different SRM possibilities for a BBright frame.

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thisisatest

Post subject: Re: Specialized carbon crank on BBright?

Posted: Wed Dec 05, 2012 6:38 pm

Shop Owner

Joined: Sat Jun 13, 2009 4:02 am
Posts: 1847
Location: NoVA/DC

You cannot. The SWorks crank spindle is only 68mm long, and symmetric. The bbright frame is 79mm wide and asymmetric.

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spud

Post subject: Re: Specialized carbon crank on BBright?

Posted: Wed Dec 05, 2012 9:22 pm

Joined: Sat Feb 07, 2009 5:52 am
Posts: 143

as above - spindle is part of the crank arm, so there is no reasonable way to utilize a longer spindle to bridge the difference. Crank arms are also dished, which if mated to an appropriate length spindle, would result in a Q factor of 165mm+

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