i use 44cm bars, but i have really wide shoulders and should really be using 46cm bars. for me, the problem with 46's is that most 46cm bars usually really bad bends in the drops and a noticeably longer reach than 44cm bars. me personally, i'd rather go with a 20mm longer stem with the 44's over the shorter stem and longer 100mm reach with the 46's, plus you can get 44's with a nice compact drop if you want...