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PostPosted: Sat Apr 20, 2013 6:10 pm 
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Joined: Thu Sep 21, 2006 8:57 pm
Posts: 4160
Location: Vicenza
I've been offered recently an used Specialized Srm, donno the exact year but has same stickers as the one used by Astana in 2010 (see below photo).

Image

I wanted to know if early model of Specialized Srm use the same specs as the Lightning cranks, which would meant I could use it also on a BSA frame.
By looking at info in here, it seems that Specialized and Lightning cranksets were similar till 2011, but from 2012 the big S changed design.


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PostPosted: Sat Apr 20, 2013 7:13 pm 
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Joined: Fri Feb 24, 2012 5:43 am
Posts: 40
Location: San Diego
The 2010 models still offered an English BB which was discontinued in 2011, which may explain how the SRM was mounted.


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PostPosted: Sat Apr 20, 2013 9:40 pm 
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Joined: Thu Sep 21, 2006 8:57 pm
Posts: 4160
Location: Vicenza
So that would confirm that the Lighting BSA BB could fit?
I mean like this one... http://www.lightningbikes.com/cranks/bb-cup-types.html ?
Cheers


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PostPosted: Sat Apr 20, 2013 10:35 pm 
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Joined: Wed Jun 22, 2011 9:39 pm
Posts: 147
NO! been there done that, specialized spindle is OSBB length which is about 20mm (i forget the exact figure) too short. You can bodge it with a lightning crank on the spider, but the spider is offset away from the frame too far, and is rotated about 18degrees, meaning that one chainring bolt is partially obscured by the crank arm. Don't do it unless you have a proper BB30 native frame.


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