Originally Posted by
Fiery
When setting up a new bike, how do you set the saddle setback? Do you go relative to the bottom bracket (say, nose of saddle X cm behind center of BB), or relative to the seat tube and seat post (say, center of saddle rails X mm behind centerline of seatpost)?
Are you asking what someone actually does, or what one should do? Relative to the BB is the only correct method.