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Old 07-01-11, 09:22 PM   #1
Konasutra
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Minimum Chainring that can be used on a FSA Compact?

On my Kona I have a FSA 50/39/30 at the present. What is the smallest tooth count on the small ring that i can go to and not effect any shifting issues. I am running a 11-34 cassette. I am wanting to be able to spin more in the steep climbs when touring. Any help is appreciated.
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Old 07-02-11, 12:14 AM   #2
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I think you can do a straight swap to a 24
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Old 07-02-11, 02:01 AM   #3
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+1
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Old 07-02-11, 02:05 AM   #4
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Use a chain catcher with the 24T.
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Old 07-02-11, 03:03 AM   #5
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24-39-42, with the 9 speed 11/34 makes a modern day half step + granny setup.
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Old 07-02-11, 07:16 AM   #6
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Originally Posted by fuzz2050 View Post
I think you can do a straight swap to a 24
Yep, a 24T will fit and +1 on the chain watcher. You will probably not be able to use the smallest two or three rear cogs with the smaller granny ring as the chain will be slack.
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Old 07-02-11, 11:22 AM   #7
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You will probably not be able to use the smallest two or three rear cogs with the smaller granny ring as the chain will be slack.
Yes, the setup will likely exceed the wrap capacity of your rear derailleur, OP. But this is okay on a triple because you shouldn't (and don't need to) use the smaller cogs with the inner chainring. At this point it's time to get in the middle. As you said, the inner chainring is really just for those steep climbs.
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Old 07-02-11, 04:43 PM   #8
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You won't notice any problems with the 24. The "racing triple" idea is manufacturers BS.
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Old 07-02-11, 07:12 PM   #9
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The "racing triple" idea is manufacturers BS.
I agree that a 30T granny isn't real helpful but it keeps the total tooth count within the range of a long cage road derailleur so using the small/small combination won't cause a slack chain. The manufacturers have to make it as fool-proof as possible.

If you know about wrap capacity and don't insist on using small/small or small/next-to-small combinations, a 24 or 26t granny ring is fine.
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