The S-Works Pave SL Carbon Seatpost was initially designed for Specialized bikes that you'd see racing internationally on televised events. Its aerodynamic D-shape fits the 2020 Tarmac and Roubaix models, and it's part of the S-Works collection of premier cycling gear by Specialized. Carbon makes it ultralight and vibration-dampingly stiff, and it encourages the saddle to move in a perfect back and downward motion. The aluminum head adjusts between two setback option with a single bolt that's easy to access.