Shimano's highest level chain, made for use with XTR mountain bike and Dura-Ace road bike drivetrains. The M9100 offers the smoothest, quietest shifting as well as outstanding reliability, and is also the lightest chain Shimano make. Featuring a super narrow lightweight 12-speed Hyperglide+ chain for smooth shifts and maximum durability. Shimano 12-speed Hyperglide+ chains have computer designed plate profiles to operate seamlessly with Shimano DCE 12-speed chainrings and cassette sprockets, resulting in 1/3 faster shift time than Hyperglide systems even under load. The outer plate design has been developed to reduce the chance of chain suck. Features: Sil-Tec surface treatment technology (PTFE plating) on inner and outer links and rollers that is smooth running and increases durability Zinc-Alloy plated inner and outer links Hollow pin for added weight saving For use with 12-speed HG+ drivetrains Comes complete with Quick Link which enables fast tool free chain assembly 126 links