SHIMANO 105 - 11-Speed - Super Narrow - HYPERGLIDE - SIL-TEC - Road Chain This Super Narrow HG-X11 directional chain offers precise shifting and improved durability thanks to SHIMANO's SIL-TEC treatment on the inner plate surfaces. System engineered drivetrain component for optimal power transfer Inner-plate treated with SHIMANO's ultra-low friction surface treatment “SIL-TEC” (inner plate) Same durability as current 10-speed chain Smooth and precise front and rear shifting Directional chain Weight: 257 g (114 Link) PRODUCT SPECIFICATIONS MODEL NO CN-HG601-11 SERIES SHIMANO Average weight 257 Chromizing treatment link pin ✔ Pin link plate Gray Roller link plate SIL-TEC Type HG-X11 E-Bike RD system compatible ✔