Zipp: PRECISION AND INNOVATION On today’s road bikes, silver stands out amid the sea of stealthy black color schemes. This time-honored seatpost color is available on the Zipp Service Course Seatpost. Since the introduction of our line of Service Course and Service Course SL components we’ve had amazing success with our pro level athletes in all disciplines. While the successes have been proving, we have also drawn from their feedback. We not only learned how and why athletes make their equipment choices, but how our manufacturing methods and materials affect product performance. With new knowledge as well as new engineering, we are proud to offer redesigned Service Course seatposts.FEATURESDistinctive silver finish2-bolt adjustability20mm and 0 offset versions SPECIFICATIONSMaterial (SP/ST): Al-6061Post diameter: 27.2mm, 31.6mmPost length: 350mmColor (SP): n/aHardware: SteelClamp Material: Al-6061Offset/Setback: 0mm