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  • Cheers, really helpful. Just to be clear, with those 9sp derailleurs, I'll still be able to use a 10 speed not a 9 speed cassette right? Maybe I should just use the 105 5700 medium cage which apparently works up to 32t and will presumably play perfectly with my shifters.

  • Yes. It's the shifters and the cassette that 'have' to match as they decide the movement. The rear mech just needs to be able to move the necessary amount.

  • The rear mech just needs to be able to move the necessary amount

    It not only has to move the right total distance, it also has to move in the right proportion to the cable pull if you want indexing.

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