Due to the used materials and the special anti-friction treatment, the 11-speed chain is quieter than ever and has a super smooth operation. The reduced width of 5.5mm with the new spacing and a special material has been envisaged for the outer links. It is necessary to use tool UT-CN300 to fit it. The Ni-PTFE treatment ensures smoothness and long life. The Ultra-Link fastening system guarantees strength and operation with the 11-speed sprockets.