What Is the Shimano SM-CN900-11 Quick-Link For?

The SM-CN900-11 is Shimano's 11-speed chain quick-link, providing tool-free chain installation and removal for Shimano 11-speed road and MTB drivetrains. Each package contains two quick-links, which is enough for two full chain installations or for keeping a spare on hand during a long ride or race. The quick-link functions as a master link: the two halves thread together and seat under chain tension, locking the chain into a complete circuit without requiring a chain tool to push a pin. The nickel-plated construction adds corrosion resistance and gives the link the durability needed to withstand the lateral and torsional forces generated by 11-speed shifting, where chain and cassette tolerances are tighter than in wider-pitch 10-speed and below systems.

Shimano rates the SM-CN900-11 as non-reusable. Once the link has been ridden and the locking mechanism has seated under load, it should be replaced with a new quick-link each time the chain is removed. Reusing a seated quick-link can result in link failure under pedaling load. The SM-CN900-11 is compatible with Shimano 11-speed HG chains including the CN-HG601, CN-HG701, CN-HG901, and other Shimano 11-speed chain models across road, gravel, and MTB drivetrains. For any rider on an 11-speed Shimano drivetrain who wants convenient tool-free chain installation and removal with a factory-grade quick-link, the SM-CN900-11 two-pack is the correct consumable.