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 Post subject: Mavic cranks
PostPosted: Mon Apr 18, 2011 8:36 pm 
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I understand there are 2 different types, can anyone tell me what these ones are? And the rough timezone?

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PostPosted: Mon Apr 18, 2011 8:52 pm 
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There are indeed two variants of 631 "starfish" crank. Those are the earlier variant: 1989-1994. The smallest outer ring you can fit is a 48t. The later variant (the 631/2) could take a 44t.

http://www.tearsforgears.com/2010/05/ma ... -6312.html

There'll be a date code on the back of the arms.


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PostPosted: Mon Apr 18, 2011 8:58 pm 
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:D nice one, there is a 9106CC on the reverse, 91's then? Flookily I bought a Mavic rear mech last week blindly and it seems its also part of the grouppo :D . I was going Ultegra 600 with a build but I may go with these if I an source a front mech.

good price too methinks?

http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 500wt_1156


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PostPosted: Mon Apr 18, 2011 9:16 pm 
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kaiser wrote:
:D nice one, there is a 9106CC on the reverse, 91's then?

Yep.

Quote:
good price too methinks?

Not bad at all.

My favourite use for these is as singlespeed/fixie cranks. You can remove the mounting posts from the rear of the spider and bolt a chainring on directly, as Graeme Obree did:

http://www.flickr.com/photos/34874593@N03/3691212984/

With a short (102mm) Campag bottom bracket you get a very low Q.


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