This is the setup I am currently thinking of putting on my new build: 44t Sugino chainring with 140mm crank arms. 15t cog in the rear. Why this setup? Because I'm short. Like 4"10 short. My only concern is that this might be a bit difficult to pedal because it's harder to generate torque with such a short crank arm length. What are thoughts on this? Should I go 150mm instead? It's only .5" gain . . .