SHIMANO 105 - 11-Speed Super Narrow - HYPERGLIDE - SIL-TEC Road ChainThis Super Narrow HG-X11 directional chain offers precise shifting and improved durability thanks to SHIMANO's SIL-TEC treatment on the inner plate surfaces.Sil-Tec, an advanced surface plating technology to increase both performance and durability.It adds a low friction surface treatment that runs smoother and lasts longer.What about Sil-tec? FEATURESSystem engineered drivetrain component for optimal power transferInner-plate treated with SHIMANO's ultra-low friction surface treatment “SIL-TEC” (inner plate)Same durability as current 10-speed chainSmooth and precise front and rear shiftingDirectional chainUsage: Road Bike, Cyclocross, E-Bike, MTB, Gravel, All road / Gravel RoadPRODUCT SPECIFICATIONSMODEL NO CN-HG601-11Average weight 257Chromizing treatment roller link pin ✔Type HG-X11Pin link plate GrayRoller link plate SIL-TECE-BIKE rear derailleur system compatible ✔