Precision made using premium steel in Germany and offers smooth, high performance gear changes with WippermannâÂÂs engineered design.The reinforced design combined with stainless steel inner links make this chain extremely resistant to the high-torque load changes in e-bike drives.Stainless steel inner links and rollers for maximum strength and durabilityHeat treated steel outer platesSupplied with the exclusive, re-usable, tool-free Connex QR joining link.Compatible with all bicycle 9-Speed gear systems, especially suited for heavy duty E-bike and mountain bike use.