Originally Posted by
Fiery
It's funny how many people think that saddle setback should somehow be related to frame size in the same way that stem length is. As long as seat tube angle is the same, a rider's saddle setback doesn't change no matter the frame size.
Yes, but seat tube angle tends to change with frame size. For any given bike, smaller frames tend to have a steeper STA so dropping a frame size may require moving the saddle back slightly to maintain the same relationship with the pedals.