Just found this thread, i posted this earlier today on another thread, might be helpful.
Years ago i settled on 40 - 11 (3.64/1 Ratio) as my perfect hardest gear, ensuring i never run out of cadence on any of the fastest tracks i ride.
38 - 11 (3:45/1) left me a little short but improved my climbing gears when the largest rear cog available was a 36t, so i usually ran that.
The kenevo stock gearing of 32 - 11 (2.91/1) is an absolute joke, and the largest front sprocket you can get away with is a 36t, so i fitted one straight away. But with a highest ratio of only 3.27/1, it still leaves you spinning out if you try to pedal at high speed. Fitting a 10 toothed cassette in conjunction with the 36t sprocket gets me as close as i can to the optimum 40 - 11 configuration as possible at 3.6/1, and is as hard as you can go without resorting the the overpriced and apparently unreliable (not tried it myself) E-Thirteen 9 toothed cassette, the benefit though if you do choose that cassette is that you then have the option of running smaller front sprockets again, improving the chain/suspension interaction problems that are possibly created by using a 36t front sprocket.
Any effect using a 36t on the front has on the lower gears would be solved by fitting, for example, a Hope 10 - 48 cassette, the stock GX mech is designed to shift up to a 48t.
Lowest stock gearing at 32 - 42 gives you a 1.31/1 ratio, fitting the Hope 10 - 48 cassette with a 36t front sprocket gives a 1.33/1 lowest gear, so almost totally eliminating the problem of gearing up the whole system by fitting a 36t sprocket.
I hope that's clear enough, basically i totally recommend a 36t front with a 10 - 48 rear if you want a normal, adult range of gears, rather than one from a kids bike.
