3T Dorico Pro Seatpost-27.2mm x 280mm, 25mm Setback:DORICO PRO is our entry-level setback seatpost. The shaft, a top-grade alloy, is bonded into the head, setting the saddle rail supports 25 mm back of the posts centerline. Twin alloy yokes are captured by recessed bolts, giving accurate control over saddle angle a key factor for long-term rider comfort. Modern materials and fabrication make this design classic light and affordable. Like the Ancient Greek architectural column it gets its name from, DORICO is built to provide elegant, robust support that stands the test of time.