The Shimano CN-HG601 105/SLX 11-Speed Chain is lightweight, narrow, and designed for smooth, durable shifting on HG-EV 11-speed drivetrains. Featuring Sil-Tec surface treatment for reduced friction and increased durability, this 5.62mm chain is easy to install and delivers near-silent, smooth shifts under high load. Outer and inner plates are optimised to prevent chain suck and improve gear contact. Buy your bike gears at Halfords, the UK's largest bike accessories retailer.