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 Post subject: 130 BCD chainrings
PostPosted: Wed Apr 23, 2014 6:38 pm 
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Joined: Fri Jul 25, 2008 8:51 pm
Posts: 245
Location: London
Quick question - what are the smallest rings I can fit to a 130 BCD crankset?

I have both Shimano DA 9000 and Campagnolo SR and want to get as close as I can to a compact without having to buy a new crankset.


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 Post subject: Re: 130 BCD chainrings
PostPosted: Wed Apr 23, 2014 6:52 pm 
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Joined: Wed Sep 17, 2008 6:25 pm
Posts: 282
Location: Nashville!
38t

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 Post subject: Re: 130 BCD chainrings
Posted: Wed Apr 23, 2014 6:52 pm 


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 Post subject: Re: 130 BCD chainrings
PostPosted: Wed Apr 23, 2014 7:17 pm 
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Joined: Sat Jul 29, 2006 2:36 am
Posts: 1310
Location: UK
Campag is 135 BCD and 39t


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 Post subject: Re: 130 BCD chainrings
PostPosted: Wed Apr 23, 2014 7:30 pm 
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Joined: Tue Sep 11, 2012 6:07 pm
Posts: 1114
Location: The Lone Star State
Shimano DA9000 uses a 110BCD for all rings, so you could go with a 50/34T combination all the way up to a 55/42T.

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 Post subject: Re: 130 BCD chainrings
PostPosted: Wed Apr 23, 2014 7:35 pm 
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Joined: Fri Jul 25, 2008 8:51 pm
Posts: 245
Location: London
Thanks all and particularly FIJIGabe. That's helped make my mind up.

Think I'll dump my SR and 7900 groupsets and upgrade to 9000.


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 Post subject: Re: 130 BCD chainrings
PostPosted: Wed Apr 23, 2014 8:19 pm 
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Joined: Wed Oct 06, 2004 6:55 pm
Posts: 2485
Location: Vienna, AUT
Or just get a Campy crank with 52 - 36 and not compromise...


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 Post subject: Re: 130 BCD chainrings
PostPosted: Wed Apr 23, 2014 9:10 pm 
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Joined: Mon Apr 21, 2014 9:17 pm
Posts: 159
Location: Belo Horizonte, Brazil
I think that if you can spend the premium, go for the DA9000 (or U6800 or even 105 5800). Like FIJIGabe said they use one BCD for all chainrings, but you must use the compatible chainrings. I don't know if the crankarms and the chainrings from the three groups are cross-compatible.


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 Post subject: Re: 130 BCD chainrings
PostPosted: Wed Apr 23, 2014 10:08 pm 
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Joined: Tue Dec 17, 2013 2:50 pm
Posts: 453
Location: Istanbul, Turkey
rma, 52/34 and the like were being used in TdF by Shimano sponsored teams. It does degrade shifting though.


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 Post subject: Re: 130 BCD chainrings
PostPosted: Thu Apr 24, 2014 12:33 am 
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in the industry

Joined: Sun Sep 27, 2009 3:08 am
Posts: 88
Shimano will accept a 38 tooth. Campagnolo will accept a 39 tooth.


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 Post subject: Re: 130 BCD chainrings
Posted: Thu Apr 24, 2014 12:33 am 


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 Post subject: Re: 130 BCD chainrings
PostPosted: Thu Apr 24, 2014 1:49 am 
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Joined: Wed Mar 19, 2014 3:18 pm
Posts: 244
The 9000, 6800 and 5800 stuff is all interchangeable

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