Kmc z1x ept chain kmcs latest breakthrough in rust protection ecoproteq treatment doubles rust resistance compared to the rust buster treatment benefits of the smoother coating are less noise great performance maximum rust resistance and a great look higher inner plates prevent chain drop features 12 x 18 112 128 links pin length 86mm ecoproteq anti rust technology for internal gear hubsingle speed less maintenance high reliability no dropkmc chainsfor many years kmc has enhance