KMC X1 Rohloff Compatible Chain: This chain is KMCs solution to all people riding single speed, fixies or bikes with hub gears. With KMCs " Double Durability" this chain is designed to outlast any of the competition, perfect for the market of "fit & forget" components! The general idea of having single speed or internal hub gears is for lengthened life & low maintanence, this chain follows that same ideal.