Originally Posted by
rpenmanparker
No, first let me say how it seems to me.
When you stretch out and/or lower your torso to a shallower angle re: the top tube, your sitz bones are no longer the contact points with the saddle. The contact points actually move forward to other structures in the pelvis. In order to place these on the supportive wide part of the saddle without changing the relationship of the legs to the bottom bracket, you would need to move the saddle forward, not backward.
Try this:
Stand balanced on the pedals of your bike- stationary, in an upright riding position,
& lower onto the saddle, noting where your butt lands.
Then do the same thing in a lower, aero position.