The kmc x11 sl 11 speed chain this kmc x11 gold 11 speed chain is superlight sl and features their non directional allowing maximum compatibility no matter mtb or race this chain fits all also the x bridge system provides quiet quicker and smoother shifting every time kmc x11 sl 11 speed chain features compatible with all 11x systems 12 x 11128 114 links pin length 55mm titanium nitride coated double x durability superlight 239g only