How much of a difference would dropping from ~71 to 68 gear inches make? The original chainring on my IRO crankset is getting pretty worn and is needing replacement along with the chain. I'm thinking about going from a 46T to 44T. I'd like to do this mainly because it gets pretty effing windy here and I'm sick of trudging along at 15 mph into the wind. Plus, I'd like to improve my spin.