NGMN wrote:This is only half of the equation right? Bars come in various reaches from about 70 to about 90. FWIW, I'm a smaller guy and run a 90mm stem on an average reach bar of about 80mm.
Yes, bar dimensions are the other part of the equation! Different combinations of stems and bars (not to mention number of spacers, angle of bars and location of shifters on bars) can be used to position your hands in the same place in space relative to the steerer tube. It seems kind of silly to talk about ideal stem length without at least taking bar dimensions into account. E.g., if you think 100mm is your ideal stem length with Ergonova bars (77mm reach), then 90mm would become your ideal with Ergosum bars (89mm reach), everything else being equal.