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PostPosted: Thu May 02, 2013 9:07 pm 
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Joined: Fri Feb 10, 2012 4:27 pm
Posts: 539
I know, I know, calculate derailleur capacity and all that...

but I don't have time to get a new derailleur fitted and tuned before going to the mountains.
has anyone tried pushing their luck with a 12-30 on a sram force short cage derailleur?

how about a 50-34 and a 12-28? that seems to exceed derailleur capacity as well.


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PostPosted: Thu May 02, 2013 9:16 pm 
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Joined: Mon Nov 01, 2010 3:53 am
Posts: 20
I've gotten a rival short cage to work with my 12-30 Tiagra cassette. Just had to max out the B-Adjustment screw. In the end, I bought a Apex wi-fli RD so I wouldn't have to worry about it.


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PostPosted: Thu May 02, 2013 9:26 pm 
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Joined: Mon Feb 19, 2007 7:26 am
Posts: 1937
Location: Atlanta, GA, US
12-28 works just fine, I'm using that right now with a compact crank. 12-30 might work, 12-32 does not from my experience.

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PostPosted: Thu May 02, 2013 11:06 pm 
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Joined: Tue Nov 11, 2003 9:47 pm
Posts: 2154
Location: Santa Cruz, California, USA
I used 50/34 and an 11-30 cassette with 2012 Red for some climbing races last year.


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PostPosted: Wed May 08, 2013 1:18 pm 
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Location: San Francisco, CA
May need to switch bottom pulley to 10 t, but should work. 32 may enemy work if lucky. Can also replace ramp screw with longer one, which may help. But probably okay. Better with 34-46.

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