The Shimano CN-HG601 QL 11 Speed Chain is a super narrow HG-X11 directional chain that offers precise shifting and improved durability thanks to SHIMANO's SIL-TEC treatment on the inner plate surfaces. It is a system engineered drivetrain component for optimal power transfer and it features an inner-plate treated with SHIMANO's ultra-low friction surface treatment “SIL-TEC” (inner plate) for that ultimate performance you seek. The Shimano CN-HG601 QL 11 Speed Chain offers smooth and precise front and rear shifting you can rely on no matter the situation.