The other day, I was riding home and the wind had shifted and grown stronger. I've got a 17t cog on one side, and an 18t on the other. I debated as to whether or not to stop and flip my wheel from the 17 to the 18.
I never did. But I wondered, at what point do people stop and turn their wheel around? For example, my optimum cadence is about 95. I know this from a lot of time on a road bike with a cadence computer. 44/17 means I go about 19.5 mph at that rpm. 80 rpms sends me down the road at 16.4 mph.
So how low should my rpms and speed get before I stop and turn my wheel around?