Quote Originally Posted by azfiddle View Post
Sorry, can you explain what "zero setback seatpost" means?
As I understand it, it basically means that the seatpost clamp is directly above the post itself, rather than offcenter or "set back." Your seat tube has an angle (say, 74 degrees) that effectively changes when you use a seatpost with an offset clamp. By using a zero-setback seatpost, you keep your seat tube angle the same. Some of us (most of us, I'd wager) use an offset seatpost because we need to get farther behind the pedals/bottom bracket than the STA allows. I, for one, usually need a lot of setback.