Dude I have a 17.45 cog in my toolbox! It's an 18 with most of a tooth broken off I figured it was BS, but the guys that run those setups are totally convinced.They're full of ****. 22/12 is actually a little higher than 32/18, it's actually equivalent to a 32/17.45 (which is obviously impossible to actually achieve). A gear ratio is what it is, no matter how you get to it. Their micro drive is probably a tiny bit lighter, and will wear out faster, and that's about it.