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It depends on your rear derailleur. For 11-34 you will need a long cage one.


The derailleurs are usually matched to the size of the cassette/chainrings. the cage length of the rear derailleur is matched to the largest cog. that is why you see mountain bikes with a 34 tooth in back with long cage derailleurs and road racing bikes with the little derailleurs matched to the corn cob size cassettes. The curvature of the front ...

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