Easton EC70 350mm Carbon Seatpost. The Easton EC70 carbon fiber seatpost is the epitome of impressive strength and minimal weight. The EC70 utilizes a forged aluminum head bonded to a carbon fiber quill and this combination delivers an impressive strength to weight ratio in a more affordable package than Easton's flagship EC90 edition. By incorporating RAD Relief Area Design and TaperWall technology, the EC70 has been designed to distribute stress along the length of the post. Furthermore, the clamping mechanism provides 12mm of offset to provide the means to fine tune your saddle position.