The Zipp SL Speed Seatpost is a lightweight, durable, and versatile component. It is made with a carbon fiber construction for a lightweight and strong feel. This post is a favorite of high level road riders and cyclocross racers alike. SRAM uses their Exogram technology to make the tube as light as possible while simultaneously optimizing the clamping system for adjustability, security, and ease of use. This version is setback 20mm for riders who prefer a specific riding position. It is compatible with the Zipp SL Speed Internal Battery Mount which is sold separately for riders who run a Shimano Di2 groupset. The Zipp SL Speed Seatpost is a great choice for road riders and cyclocross athletes alike.