The Dedicated HYPERGLIDE+ Chain for Shimano XT 12-Speed Systems

The Shimano Deore XT CN-M8100 is a 12-speed mountain bike chain specifically developed for use with Shimano's HYPERGLIDE+ drivetrain system. HYPERGLIDE+ is Shimano's technology for shifting under load - allowing gear changes to be made while pedalling hard rather than requiring the rider to momentarily ease off the power to allow the chain to move cleanly between cogs. The CN-M8100 is the dedicated chain for this system, engineered with the inner plate geometry and chain-cog interface required for HYPERGLIDE+ to function as designed. Using a standard chain on a HYPERGLIDE+ cassette and derailleur system compromises the performance that the system was designed to deliver.

The chain is e-bike rated - confirming its construction is suited to the additional torque and chain loading that pedal-assist motor systems generate compared to standard mountain bike use. For riders on XT-equipped e-MTBs where the motor amplifies pedalling torque through the drivetrain, an e-bike rated chain provides durability appropriate to those demands.

The silver finish at 252g is appropriate for a 12-speed XT chain where the narrower chain profile of 12-speed requires lighter overall construction than wider-pitch alternatives. A Shimano SM-CN910-12 Quick-Link is included - a single-use master link for chain installation. The Quick-Link is non-reusable and should be replaced if the chain is removed for cleaning or service. An additional Quick-Link should be kept as a spare for trailside chain repair if needed.

• HYPERGLIDE+ technology dedicated chain delivers greater chain retention improved shifting efficiency and smoother transmission over rough terrain
• Extended inner plate improves chain engagement
• Reduced shift times and pedaling shock
• Includes non-reusable Shimano Quick-Link (SM-CN910-12)

HYPERGLIDE+ Technology and Extended Inner Plate

HYPERGLIDE+ technology in the CN-M8100 operates through two specific chain design features working together. The first is the chain's compatibility with the HYPERGLIDE+ shift ramps and pins on compatible cassettes and chainrings - the chain's inner and outer link profiles are designed to interact with the ramp and pin geometry of HYPERGLIDE+ cogs to guide the chain during shifts in a way that standard chains cannot replicate. The second is the extended inner plate design, which improves chain engagement with the cog teeth during the critical moment of a shift under load.

The combined effect is reduced shift times - faster gear changes from one cog to the next - and reduced pedalling shock during shifts. Standard drivetrain shifts create a momentary interruption to power delivery as the chain moves between cogs. HYPERGLIDE+ with the correct dedicated chain minimises this interruption, maintaining more consistent power delivery through the shift for a smoother riding experience on rough terrain where maintaining momentum through technical sections matters.

138 Links, Single-Use Quick-Link, and Installation

The chain ships at 138 links - the standard length for most 12-speed mountain bike drivetrain setups that may require shortening to the correct length for the specific bike's chainstay length, chainring size, and cassette size combination. Chain length should be set using Shimano's recommended sizing method for the specific drivetrain configuration. The included SM-CN910-12 Quick-Link is the correct single-use master link for the CN-M8100 - do not use a different brand or specification of master link as this may compromise chain security and HYPERGLIDE+ performance.

FAQs

What drivetrain is the Shimano XT CN-M8100 chain designed for?

The CN-M8100 is specifically designed for Shimano 12-speed HYPERGLIDE+ drivetrain systems - including XT M8100 series components. It is the dedicated chain required for HYPERGLIDE+ to function as designed and should not be substituted with a standard chain on a HYPERGLIDE+ system.

What is HYPERGLIDE+ technology and what does it do?

HYPERGLIDE+ is Shimano's under-load shifting technology that allows gear changes to be made while pedalling hard. The CN-M8100's extended inner plate and specific chain geometry work with HYPERGLIDE+ cassette ramps and pins to reduce shift times and minimise pedalling shock during gear changes.

Is the CN-M8100 compatible with e-bikes?

Yes. The chain is e-bike rated, confirming its construction handles the additional torque and chain loading generated by pedal-assist motor systems.

Is a master link included and is it reusable?

Yes. A Shimano SM-CN910-12 Quick-Link is included. It is a single-use master link - it should not be reused after removal. Carry a spare Quick-Link for trailside chain repair.

How many links does the CN-M8100 ship with and does it need shortening?

The chain ships at 138 links and will typically require shortening to the correct length for your specific drivetrain configuration. Use Shimano's recommended chain sizing method for your chainring size, cassette size, and chainstay length.

Specs: