From my trek madone SLR7, but works with all SLR frame versions. I didn’t like how stretched out the default setback post sat me, this took 20mm out of the reach and brought me over the pedals again.
Was over $500 new from trek website, looking for $225
Direct replacement proprietary seatpost for Trek Madone SLR bikes
Color matched for direct compatibility
2-bolt design offers independent setback and tilt adjustments
100% OCLV carbon fiber construction
Size : 20x60mm Aero x 205mm x 5mm offset (vs standard 25mm)