12 Speed - Employing the latest technologies and performance from Shimano’s flagship XTR M9100 mountain bike components
The new Shimano DEORE XT M8100 series features Shimano’s 12-speed versatility while offering superior shifting and braking systems specifically tuned for trail riders.
New Shimano DEORE XT delivers unrivalled component customisation and Shimano’s widest range 1x12 gear options with its 12-speed 10-51T cassette.

Hyperglide+ - Inheriting revolutionary HYPERGLIDE+ technology first found on XTR M9100, the DEORE XT M8100 group uses completely redesigned chain plates and shift ramps which guide the chain both up and down the cassette providing faster, smoother shifting in both directions even under incredible pedalling power.

Adding to DEORE XT’s M8100 smooth drivetrain transmission, the new CN-M8100 HG chain features SHIMANO’s DYNAMIC CHAIN ENGAGEMENT (DCE+) technology. An extended inner link plate of the chain connects seamlessly with new chainring tooth shapes for better chain retention and smoother, quieter pedalling. The new design reduces natural vibrations normally caused by the inner and outer chain plates rolling onto the chainring while also providing stronger contact between the two components.


Crank & Chainrings - M8100 HOLLOWTECH II crank construction offers a lighter and stiffer crank design with options for both front single and double chainrings in three Q-factor options, including a Super Boost option (172mm, 178mm, 181mm). Chainrings are easily exchanged with the new direct-mount system and the cranks can be swapped between single and double front chainring setups. All Shimano 12-speed direct mount chainrings are interchangeable. Additionally, Shimano refined chain line specifications for DEORE XT M8100 including a 55mm chain line, ensuring that the drivetrain is optimized for a greater variety of frame designs.

Wide Range and Rhythm Step Cassettes - Enhancing ride performance and expanding gearing range, DEORE XT M8100 cassettes feature SHIMANO’s MICRO SPLINE freehub technology that works seamlessly, allowing the use of 10-tooth cogs. The new design with its smaller splines also allows for an aluminium freehub body construction that isn’t damaged or gouged out by the cogs during use.
The new cassettes employ Shimano’s Beam Spider construction for weight reduction and improved power transfer utilizing a strategic application of aluminium and steel for an optimal blend of weight savings, rigidity, and durability.
510% gear ratio with smart gear steps to extend the range

Shifters and Levers - With ergonomics focused on comfort and control, the new DEORE XT RAPIDFIRE PLUS shift levers offer light operation force and better rider feedback. Shimano’s I-Spec EV lever design features greater flexibility in mounting while maintaining a clean cockpit. For double chainring systems, the lever simplifies front shifting with a lightweight and compact design that shifts up and down with a single mono lever

Braking System - Employing Shimano’s legendary mountain bike braking technology, DEORE XT M8100 increases brake rigidity for greater bike control and optimizes braking performance for different riding styles. A common SERVO-WAVE brake lever is paired with either a 2 or 4-piston caliper to deliver the right amount of power for a variety of terrain and riding styles.

Based on the SHIMANO XTR M9100 brake lever design, the new DEORE XT BL-M8100 brake levers feature a more inboard clamp position that creates an extra point of contact between the bar and the lever. This added bracing drastically increases efficiency and control over the bike while offering quick brake engagement. The new design minimizes impact on cockpit real estate, creating space between the clamp and support point for mounting other handlebar accessories.

What's in the Groupset?

• 12 speed Groupset
• 10-51 Cassette (10-12-14-16-18-21-24-28-33-39-45-51T)
• 2-piston brake calipers
• I-SPEC shift Lever

Hollow forged cranks
• 165mm
• 170mm
• 175mm

Direct Mount Chainring
• 28T
• 30T
• 32T
• 34T
• 36T

• New HYPERGLIDE+ shift technology
• Extended inner link plate
• Quick link for easy service.

RD-M8100 Rear Derailleur for 1x Setup
• For single front chainring setup
• 51T max cog size
• Works with both 10-51 and 10-45-tooth cassettes

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