Shimano XT & Ultegra CN-M8100-12 Chain

Shimano XT & Ultegra CN-M8100 12-Speed Chain

Keep your rhythm steady when the terrain gets rough. The Shimano CN-M8100-12 Chain is a high-performance 12-speed chain designed as a crucial link in both the Deore XT M8100 mountain bike and Ultegra R8100 road/gravel ecosystems. Built to handle the massive torque of modern trail riding, aggressive road sprints, and high-output E-bike systems, this chain delivers silent, lightning-fast shifting in both directions—even under full pedaling loads.

Featuring an asymmetrical, directional plate configuration, the CN-M8100 features extended inner plate edges. This proprietary design dramatically improves chain retention on Dynamic Chain Engagement+ chainrings, virtually eliminating dropped chains without sacrificing efficiency. Combined with a state-of-the-art SIL-TEC surface treatment, this chain cuts down on mechanical friction and noise, meaning you can focus on the trail or road ahead instead of a noisy drivetrain.

Key Technologies

• Hyperglide+ Optimised: Engineered with high-precision contact surfaces to glide seamlessly across the ramps of your 12-speed cassette. Enjoy continuous power transfer during shifts without interrupting your cadence.

• SIL-TEC & Chromising Treatment: Applied to the inner plates and rollers, this ultra-low friction fluorine plating shrugs off mud, dirt, and grit. Paired with chrome-plated inner pins, it significantly extends the chain's overall lifespan under harsh off-road and on-road conditions.

• Extended Inner Plates: Promotes a tighter, more secure connection with the chainring and cassette teeth, reducing annoying vibrations and delivering a whisper-quiet ride.

• E-Bike Rated: Fully approved for heavy-duty torque loads, making it the perfect upgrade or replacement for modern E-MTB and E-touring drivetrains.

Length Options & Specifications

Choose the perfect link length to match your chainring size, chainstay length, and rear derailleur cage setup. Note: We exclusively stock the versatile 126-link and 138-link variants to fit modern long-reach geometries and high-gear-range cassettes.

Quick Tech Specs

• Speed Compatibility: 12-speed

• Type: HG 12-speed (Directional design)

• Pin Link Plate Treatment: Gray finish

• Roller Link Plate Treatment: SIL-TEC / Chromised

• Roller Link Pin: Solid (chrome plated)

• Installation Connector: Non-reusable Quick-Link (included)

Pro Installation Tip: The CN-M8100 is a directional chain. When looping it through your drivetrain, ensure the logo/text side of the outer plates is facing outward (away from the frame). Installing it backward will severely compromise your shifting performance and accelerate drivetrain wear.

Pros & Cons

• Hyperglide+ shifting perfection means you can shift seamlessly under massive pedaling loads without losing power or risk of skipping.

• SIL-TEC fluorine coating and chromized pins dramatically lower friction, run incredibly quiet, and resist wear in muddy, gritty, or wet conditions.

• Extended inner plate edges offer superb chain retention, minimizing the risk of dropped chains on technical terrain.

• Fully E-bike rated and tough enough to handle high-torque mid-drive motors without stretching prematurely.

• Included SM-CN910-12 Quick-Link makes tool-free installation and trail-side repairs straightforward.

• Strictly directional design means it is easy to install backward if you aren't paying attention, which will ruin shifting performance.

• The 12-speed Quick-Link is non-reusable; once snapped open for deep chain cleaning, a fresh Quick-Link must be installed to maintain connection safety.

Shimano Garantie

All product warranties are in accordance with the manufacturer's policy (see link in the product details above). In most cases, this is a limited warranty that applies only to the original owner and excludes normal wear and tear, accidental damage, negligence (failure to clean/maintain the product), and improper installation (see User Manual link in the product details above). However, if you experience a problem with the product you purchased from bicyquel _ (original invoice required), please let us know so we can assist you with the appropriate procedure.