Components Seatposts Easton Ea70 Zero 30. 9mm. The EC70 Zero utilizes the same overall monocoque carbon construction as the EC90, but with an aluminum upper clamp. This low-profile, micro-adjusting clamp allows easy adjustment and optimal saddle clearance. By incorporating RAD Relief-Area Design and TaperWall technology, the EC70 has been intelligently designed to distribute stress along the length of the post. We also remove material in critical clamp zones to prevent pinching the carbon (which can sacrifice durability). Specifications : Weight : 240gr- Material : EASTON EC70 CARBON- Head Type : ZERO