Originally Posted by
3dbiker
So should I mount at least a 10cm or even a 9cm stem? but isn't that too short on a size 54 bike? Even on the domane size 54 and on the emonda also size 54 (which have a higher stack and smaller reach) I still tended to come forward, maybe I shouldn't raise the saddle again to increase the saddle-handlebar difference? The sensation of pulling with the hands on the handlebar especially uphill, I have read that it can depend on a limited handlebar saddle height difference
The starting point for your saddle set back should be where you can maintain your preferred back angle using only your back muscles. If you have to use your arms to support your torso, you're too far forward. Many newbs will move the saddle forward to shorten the reach, under the mistaken belief that reach is causing their shoulder and back pain. It isn't. They're essentially doing pushups to keep from falling forward. After establishing your back angle and saddle setback, find out where your hands want to go and adjust your stem rise and length to put the brake hoods under them. Generally, the back angle and angle of the humerus form an 80-90 degree angle. The current fashion if for a slightly shorter but lower reach to achieve a similar back angle, compared to, say 20-40 years ago.
I can't get into specifics without seeing how you sit on the bike. Besides leg length and overall height, arm length and posture will also be a factor. If you ride with a curved or humped back, it will shorten your effective reach by 1-2 cm.
Also consider that the cockpit shape of this bike is low. Factor markets it as "comfortable," but if you're used to riding a Domane or an H2 Emonda with a full complement of stem spacers and/or the stem flipped upwards, there is no way you're going to get comfortable on this bike without some body rehab.