ZIPP SL SPEED CARBON SEATPOSTBRINGING THE SPEEDZipp's SL Speed Carbon Seatpost is favored by cross and road racers alike. With a wide range of adjustments and super light construction, the SL Speed is a dependable and functional post. Using SRAM's Exogram technology, Zipp designed a tube that's as light as possible without sacrificing integrity. With multiple lengths, offsets, and diameters available the SL Speed can satisfy any rider, regardless of preference. Features Weight: 170g (0mm offset) 172g (20mm offset)Compatible with round and square rails Carbon post with 6061 Aluminum clamp | Zipp | Sl Speed Carbon Seatpost | Matte Black | 20Mm Offset, 27. 2Mm, 400Mm Length, B2