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PostPosted: Tue Jan 15, 2013 7:38 pm 
Dirt Disciple

Joined: Wed Jan 09, 2013 11:17 am
Posts: 60
Location: Cheshire
Quick one - as per title - any problems with the old 7speed chain rings and 9 speed chain? Trying to get myself up to speed after a 20 year layoff!


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PostPosted: Tue Jan 15, 2013 10:23 pm 
Retro Guru

Joined: Tue Jun 03, 2008 4:31 pm
Posts: 740
Yeah. It should be ok. I use far more not matching kit than that.


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PostPosted: Tue Jan 15, 2013 10:58 pm 
Dirt Disciple

Joined: Wed Jan 09, 2013 11:17 am
Posts: 60
Location: Cheshire
Cool - really want a c record crank (personally the most desirable lump of alloy ever made for a bike) but crave more modern gearset to make it more user friendly.


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PostPosted: Wed Jan 16, 2013 3:30 am 
rBoTM Winner
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Joined: Wed Dec 12, 2012 10:18 pm
Posts: 2373
Location: California
There was a long thread about this a couple of days ago and the conclusion was that as long as the cassette and chain match the set up should work. Assuming that one doesn't try and use a track crank


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PostPosted: Wed Jan 16, 2013 7:50 am 
Road Moderator
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Joined: Thu Jun 18, 2009 1:07 pm
Posts: 4715
Location: Sheppey, Kent
You could always fit later rings. I've got 10 speed rings on these but will be running it as an 8 speed (10 speed have a great finish).

http://www.retrobike.co.uk/forum/viewto ... l&start=15

Image


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PostPosted: Wed Jan 16, 2013 3:23 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8202
Location: New Forest, UK
There is no difference in the rings for 7 speed on. The 10 speed ring thing us pure marketing puff. The inside dimension of the chains is the same.


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PostPosted: Wed Jan 16, 2013 4:16 pm 
rBoTM Winner
rBoTM Winner

Joined: Sat Aug 28, 2010 3:44 pm
Posts: 422
Location: at my computer
hamster wrote:
There is no difference in the rings for 7 speed on. The 10 speed ring thing us pure marketing puff. The inside dimension of the chains is the same.


I just measured a few of my chainsets and there is a difference in spacing between the chainrings between 7 and 8 and between 8 and either 9 and 10. I doubt that it is enough to make any difference but it might make for a slight difference.


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PostPosted: Fri Jan 25, 2013 12:06 pm 
Retro Guru
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Joined: Mon Mar 26, 2012 5:21 pm
Posts: 589
So reading the above, is it the case that although 9v chains are thinner, the internal dimensions are the same?


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