This is the undisputed king of chain! Decades of Japanese engineering and refinement have brought you the most technologically-advanced chain Shimano has ever delivered. Designed specifically for today's 11-speed systems. the Dura-Ace / XTR chain uses an asymmetric layout for better performance and better shifting performance. The chain also runs very quietly, because it has been coated with SIL-TEC, a new Shimano fluorine-based metallurgic surface treatment which decreases friction and increses chain life. Not only thatm but SIL-TEC holds onto your lube better and longer, leading again to better chain performance. Finally, Shimano has added hollow pins to shed that extra weight.When it comes down to chains, details matter. Why not put the best on your bike? It deserves it. Specifications: ~ Shimano's highest end chain ~ SIL-TEC Coating for improved chain life, durability, lube retention and shifting performance ~ For Shimano 11-speed road and mountain drivetrains (compatible with Ultegra, 105, XT and SLX, etc) ~ Includes 11-Speed Chain Pin ~ Weigth : Approximately 246 grams ~ Compatible with E-bike systems Please visit our website at http://www.ecomtb.com.my OR https://shopee.com.my/eco_mtb ** There is 1-3cm errors due to manual measurement. Please kindly understand. ** Actual product colour may slightly vary due to photographic lighting sources or your monitor settings. ** WE DO NOT DO COD ** ONLINE ONLY ** We support original products only. ** PRICE INDICATED IS ALREADY BEST PRICE, EXCLUDE COURIER