Originally Posted by
dalava
If you ride hoods majority of the time, the reach of the bar as well as the shape of the hoods have a lot impact on your riding position. There could be as much as 30mm difference depending what bar and shifters you use and how you mount the hoods. That's more than one size jump in most manufacturers' geometry sizing.
I usually just swap stem along with bars in such situations. Swapping from olde style brake levers to brifters is usually good for around a 3cm shorter stem swap.