Originally Posted by
jan nikolajsen
I'd rather compromise my nuts than resorting to the visually uninspiring sloping toptube!
OT: I seem to remember reading about the relationship between fore and aft saddle position and pedal stroke efficiency. When I started wrenching 30 years ago, my bike mechanic book said something like this for ideal saddle adjustment: Hang a plumb-bob over the tip of the saddle and it should hover 2-3 cm aft of crank center. Or maybe it was in front... Any pointers?
I would agree that if the plumb line is not behind the BB, you're likely to be too far forward, but let's look at what's really happening. You are pedaling the bike, and your butt takes on some positoin on the saddle. After being fully warmed up, that position essentially represents the leg/pedal geometry that is natural for you, KOPS or no KOPS. For rear end comfort, the saddle needs to be placed so that it best supports you on your sitbones when pedaling in that location. I see nothing in this that makes the good spot corresponds to a saddle nose that is 2-3 cm behind the BB.
Road Fan