Originally Posted by
Godsight
Maybe the the ribs are set 1cm apart or less and the seatpost wedge in the frame actually lock into those ribs with custom seatpost made for each athlete so one of the ribs is at the proper seat height for the respective athlete. Could even have different seatpost for the kilo that is ribbed appropriately. I am just guessing a reasoning of it.
That'd be my guess, too.
I always wondered if the BT Edge and Ultra had seatpost issues under bigger riders.
The top of that post has silver bits which is different from the normal seatpost.