Originally Posted by
adrien
There's another factor here, which is the saddle, and where its sweet spot is relative to your sit bones. I have found my current saddles (Specialized Romins) like to be further forward than others.
True...and not even saddle specific...many will prefer a narrow saddle more forward to support the sit bones and a wider saddle farther back. Rail clamping range varies on saddles as well. So yes, the saddle can be a game changer for setback as you say.