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Mountain Chains

Shimano CN-M8100 12 Speed Chain

The 12-speed Shimano XT M8100 groupset is poised to be a top seller and the CN-M8100 12-Speed HG+ chain makes it go. Optimized for width, plate design and overall integration with Hyperglide+ chainring and cassette cog tooth profiles, the CN-M8100 is one of the quietest chains Shimano has produced, despite the massive cassette range and extreme chainline angles.

Shimano applies their SIL-TEC ultra-low friction surface treatment technology to this chain. SIL-TEC is an advanced plating process that improves system performance through the use of imbedded fluorine particles resulting in systems that run smoother and wear longer in all conditions. One of the major focus points of the M8100 drivetrain was Shimano's commitment to smoother, quieter, and more intuitive shifting performance. The chain is crucial to all of these elements. Shimano engineered the Hyperglide+ system to help riders seamlessly maneuver rough trails by reducing pedaling shock and cutting shifting times by a 1/3 versus the current HG system.

A second major focus was on chainwrap and retention of the chainrings and cogs. This was achieved by extending the end of inner plate to firmly hold both throughout the pedaling action. The engineers also made subtle changes to the outer edges of the plates, no doubt to improve up and down shifts by reducing friction points. This true even with the wider teeth of the chainring. The inner plates seem to be chamfered, allowing the chain to self center on the teeth which decreases stress on the plates and rollers, reducing wear and allowing the chain to sit as deeply on the profile of the teeth as possible. The mere 10-12 gram difference from the XTR-level to the XT-level chain is in the hollow pins used by XTR. With this XT version, you get solid pins and save some cash.

The CN-M8100 12 Speed Chain employs a 12-speed specific version of the Quick Link system (SM-CN910-12), and it is not recommended you use any other option. As with the 11-speed Quick Link, the 12-speed version is a single-use item. Once you install then remove, it needs to be replaced. We recommend you pick up a few so you have them at home for cleaning or service, as well as having one in your saddle bag or hydration pack. While it is much easier with proper chainling plier tools, the link can be separated or installed by hand. The 256 gram chain comes at full length with 116 links.

Features

  • 12-speed HG+ chain for Shimano M8100, M9100, M7100 drivetrains
  • Optimized for width, plate design and overall integration with Hyperglide+
  • Chromizing treatment protects roller link plate
  • SIL-TEC treatment for extended offroad durability
  • Commitment to smoother, quieter, and more intuitive shifting performance
  • Major focus was on chainwrap and retention of the chainrings and cogs
  • Self centers on the 1x teeth which decreases stress on the plates and rollers
  • Compatible with 1x or 2x 12-speed HG+ mountain drivetrains
  • Utilizes single use SM-CN910-12 12-speed Quick Link system
  • Solid-pin, highly evolved and proven chain design for XT- M8100
  • Color: Silver
  • Weight: 252 grams (at average of 114 links)