• A 9 speed 11-32t with a 42t chainring would be a good balance;

    11, 13, 15, 17, 19, 21, 24, 28, 32t

    compare to a 11-36 10 speed, only difference is the additional 36t;

    11, 13, 15, 17, 19, 21, 24, 28, 32,** 36t**

    A gappier 9 speed 11-34 would work if she doesn't mind it;

    11, 13, 15, 17, 20, 23, 26, 30, 34t

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