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  • Weighing-up the options for a SRAM 1x10 or 11 group for a TT bike that is currently Shimano 2x11.

    I understand that SRAM cassettes will fit a Shimano freehub, but am I right in thinking that they are differently spaced, on account of the 1:1 cable pull (Exact Actuation)?

    SRAM lists the regular 500/900 aero shifters as using EA, but not the R2C shifters: seems odd, is this right? If so could I use R2C shifters with a Shimano cassette?

    The reason I'd like to use a Shimano cassette, is because this would allow a Power Tap to be shared with two other Shimano 10 speed bikes, without having to swap cassettes.

    Assuming I can't get SRAM to work with the Shimano bikes, what options do I have for a Shimano RD with a clutch?

  • I understand that SRAM cassettes will fit a Shimano freehub, but am I right in thinking that they are differently spaced, on account of the 1:1 cable pull (Exact Actuation)?

    The spacing on 10 speed Shimano and SRAM cassettes is the same. SRAM mechs and shifters have different cable actuation ratios, so you can't mix'n'match shifters and mechs, but the net result is the same amount of movement per click at the derailleur.

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