Shimano CN-M8100 XT/Ultegra Chain 12-Speed 138 Links: The Shimano Deore XT/Ultegra CN-M8100 12-speed chain is optimized for use with the Deore XT M8100 MTB and 12-Speed Ultegra drivetrain systems. HYPERGLIDE+ technology dedicated chain delivers greater chain retention, improved shifting efficiency, and smoother transmission over rough terrain Extended inner plate improves chain engagement Reduced shift times and pedaling shock Non-reusable Includes Shimano Quick-Link (SM-CN910-12) Will fit any Speed12 Shimano system - Derore, XT, SLX, XTR! SERIES XT TYPE HG GENERATION M8100 SPEEDS 12