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PostPosted: Wed Dec 05, 2012 11:00 am 
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Joined: Fri May 25, 2012 12:05 pm
Posts: 30
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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PostPosted: Wed Dec 05, 2012 6:38 pm 
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Posts: 1980
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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Posted: Wed Dec 05, 2012 6:38 pm 


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PostPosted: Wed Dec 05, 2012 9:22 pm 
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Joined: Sat Feb 07, 2009 5:52 am
Posts: 447
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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PostPosted: Thu Dec 29, 2016 8:48 pm 
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Joined: Wed Oct 31, 2007 10:32 pm
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Location: Los Feliz, Los Angeles, California
Would a 10mm hirth extension work in this case?

It would essentially move the nds crank arm out. I understand the difference is 11mm, not 10mm, however 10mm extensions are available via experimental's shop.

Anyone else have success in applying an Sworks crank (BB30) into a BBright shell?

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PostPosted: Thu Dec 29, 2016 11:13 pm 
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Joined: Tue Nov 15, 2016 8:13 am
Posts: 39
prendrefeu wrote:
Would a 10mm hirth extension work in this case?

It would essentially move the nds crank arm out. I understand the difference is 11mm, not 10mm, however 10mm extensions are available via experimental's shop.

Anyone else have success in applying an Sworks crank (BB30) into a BBright shell?



The sworks cranks taper inwards so you can't put the extension on.

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Posted: Thu Dec 29, 2016 11:13 pm 


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PostPosted: Thu Dec 29, 2016 11:32 pm 
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Location: Los Feliz, Los Angeles, California
Taper? Yes. Looks fine with an extension here though, and extensions are being used successfully out in the field.

http://images.ttcdn.co/media/i/product/ ... g?size=500

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