Another definition of setback starts from the Plumb bob vertical line thru the BB axis..
Part of frame design..
I'm looking for durability and more adjustability. And a handsome design wouldn't be too shabby.
Riv Bike imports Nitto's Straight seatpost in 27.2
w 22.2 top... premium quality.
Brompton Penta Clip is the best saddle clip Ever made , IMO.
stepless through 360 degrees rotation, holds fast, 1 bolt. 90% aluminum.