• I'm pretty sure that the cog spacing is different for 11spd but the 11spd shifters pull less cable per click, it's the ratio of cable pulled to cage movement that stayed the same from 10spd to 11spd meaning you can use either type of mech but the shifters have to match the cassette
    TL;DR match shifters to cassette

  • Len is a a bit inconsistent on this it seems

    contrary to your contention, the cable pull is most definitely different on 11-speed and 10-speed SRAM road shifters.

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