RS series is a 175g ultralight seatpost. The evolution of Superleggero seatpost with the premium RS finish. The 1-bolt clamp system allows an easy and fast assembly. A fine adjustment of the saddle inclination is possible through the adjusting screw on the seatpost head. Specifications Material: UD full carbon construction Diameter: 27 2 and 31 6mm Length: 350mm/ 400mm Setback: 25mm Finish: Polish On Black Weight: 175g 27.2mm Please note: Compatible with a max 7x9 5mm oval-shape rail and staff kit. Fits Deda adapter for DI2 internal battery.