Easton ec90 zero carbon inline seatposteastons lightest seatpost incorporates rad relief area design and taper wall technology for maximum weight savings and excellent durability an all carbon post including upper and lower clamping plates the ec90 zero has been intelligently designed to distribute stress along the length of the post extra material in critical clamp zone prevents pinching of the carbon features finish ud matte carbon weight 190gr 31 6 material easton ec 90 carbon