I took the post pump out of my seat post when I got my Dahon which according to my scales shed 203g. But that sort of thing could affect resale value, if money's no object better to get an i-beam seat post. I recorded the post pump seat post as 760 grams whereas an SDG seat post and saddle combined are 610 grams. I think the newer Kore equivalent is a bit heavier though that may be because it's longer.