Originally Posted by
thump55
In my opinion: better to be a bit higher and be able to ride comfortably in the drops than to be too low so you don't want to ride the drops, or can't breathe effectively when you are. You are more aero in the drops on higher bars than on the hoods with lower bars.
This. Just raised my bars a tiny bit, and got a slightly shorter stem, after lowering them for a while. The difference? I now feel more comfortable on the drops, and I can still bend my elbows more to get as aero on the hoods as I ever would have been before. Still running about 13 cm of drop, FWIW. Same (or more) aero + more comfort = win.