Shimano XT M8100 2×12-speed Group Clamp 10-45 – MTB Group Sets


Shimano XT M8100 2×12-speed Group Clamp 10-45

The Deore XT M8100 is Shimano’s newest weapon in search of mountain bike fun and adventure. As the first group of components designed specifically for mountain bikes ever, the Deore XT M8100 continues its success story based on high durability and reliable performance.

Scope of delivery – Shimano XT M8100 2×12-speed Group Clamp 10-45

  • 1 Shimano XT FC-M8100-2 12-speed Crank 36/26 (choose variant crank arm length)
  • 1 Shimano XT SL-M8100 2×12-speed Shift Lever Set
  • 1 Shimano gear wires 1800 / 2050mm and gear cables SIS OT-SP41 1200 / 1800mm
  • 1 Shimano XT RD-M8120 2×12-speed Rear Derailleur SGS
  • 1 Shimano XT CS-M8100 12-speed Cassette 10-45 incl. Lock Ring
  • 1 Shimano XT CN-M8100 12-speed Chain 126 Links incl. Connector Quick-Link SM-CN910-12

The original mountain bike group continues its legacy: XT M8100 2×12-speed Group from Shimano

The original mountain bike group continues its legacy of remaining the standard for mountain bikers everywhere. Nearly three decades in, the DEORE XT brand is defined by its trail-tested durability, reliability and performance. Recognizing that today’s mountain bikers are riding faster and confidently on more technical terrain, the legacy of DEORE XT is more important than ever. In 2019, our pinnacle mountain bike technologies will trickle down to SHIMANO DEORE XT M8100.

Shimano XT FC-M8100-2 12-speed Crank 36/26

The Shimano XT FC-M8100 2×12-speed crank with 172 mm Q-factor, 48.8 mm chainline and 142 mm O.L.D offers maximum drive efficiency at low weight. In combination with the 10-45 tooth cassette, it delivers an incredible transmission bandwidth! The perfect set-up for long races and hard climbs. In addition to a new special 12-speed chain (CN-M8100) with the corresponding new 12-speed QUICK LINK lock, SHIMANO is also equipping the XT M8100 with new cranksets for 2×12-speed (FC-M8100-2/8120-B2).

For those who are drawn to unknown terrain, our 2×12 crank option offers the ultimate range for all eventualities. The chainring gradation of 36-26T in combination with the 10-45T cassette offers almost unlimited possibilities to tackle every imaginable terrain while keeping the cadence constant through low gear jumps.


  • FC-M8100-2 Q-Factor 172mm
  • Chain line 48.8mm
  • O.L.D 142mm
  • Compatibility 2×12-speed with CS-M8100 cassettes 10-45
  • Mounting system Direct mount (Lighter and stiffer design & easy exchangeable chainring by direct mount and one key release)

Product features

  • Use: MTB
  • Group: XT M8100
  • Model: FC-M8100-2
  • Gradation: 36-26T
  • Q-Factor: 172mm
  • Threaded BB shell width: 68 / 73mm
  •  Gear front: 2-speed
  • Gear rear: 12-speed
  • Construction: Hollowtech II
  • Compatible Chain: CN-M8100 12-speed
  • Crank arms: 4 arm
  • O.L.D: 142mm
  • Chain line: 48.8mm

Crank Arm Length (choose variant)

  • 165mm
  • 170mm
  • 175mm
  • 180mm


  • Crank arm: Aluminum Anodized
  • Crank axle: Steel Plated
  • Large Chainring: Aluminum
  • Small Chainring: Aluminum


  • approx. 654g (manufacturer information)

Shimano XT SL-M8100 2×12-speed Shift Lever Set

The Shimano XT SL-M8100 2×12-speed Rapidfire Plus (Mono) shift features a lightweight, ergonomic and compact design. In addition to the shifting behavior, the performance also increases. With 20 % quicker lever access time and 35 % less force.

Enhancing lever access and shifting speed, the new RAPIDFIRE PLUS shift levers offer light operation force and more versatility. Shimano’s new I-Spec EV lever design features greater flexibility in mounting for a clean and ergonomic cockpit. And for double chainring systems, the lever simplifies front shifting with a lightweight and compact design that shifts up and down with a single lever.


  • 20% quicker lever access time
  • Intuitive simple front control
  • Compact design and lightweight
  • Quicker lever access and light operation force maintains rider concentration
  • Greater flexibility and action-optimized cockpit layout
  • 2-WAY RELEASE for instant push/pull movements

Product features

  • Use: MTB
  • Group: XT M8100
  • Model: RD-M8100
  • Shifter Type:
    • 2-speed Rapidfire Plus Mono
    • 12-speed Rapidfire Plus
  • Mounting: Clamp
  • Gear front: 2-speed
  • Gear rear: 12-speed
  • Optical Gear Display: No
  • Instant Release: Yes
  • Multi Release: Yes
  • 2-Way Release: Yes
  • Cable adjust: Yes


  • Main lever body: Aluminum Painted
  • Lever body: Aluminium, GFRP
  • Clamp bolt: Stainless steel


  •  approx. 210g / pair (manufacturer information)

Shimano XT RD-M8120 2×12-speed Rear Derailleur

The Shimano XT RD-M8120 2×12-speed rear derailleur features an elegant yet aggressive angled design and an attractive anodised aluminium surface. The derailleurs feature bigger 13-tooth pulleys and include Shimano’s proven Shadow RD+ low profile technology. The use of a single or a double system requires the installation of the specific single or double rear derailleur (1×12: RD-M8100-SGS / 2×12: RD-M8120-SGS).


  • Shadow RD+ For optimal chain retention
  • RD-M8120-SGS  
    • 45T max cog size
    • Works with 2×12-speed 10-45-teeth cassette
  • Pulley size with 13T increased for reduced friction

Product features

  • Use: MTB
  • Group: XT M8100
  • Model: RD-M8120
  • Mount: Direct Mount
  • Technology: Shadow RD+
  • Gradations: SGS-Type 2×12-speed (10-45 cassette)
  • Compatible chain: CN-M8100 12-speed
  • Max. teeth large sprocket: 45T
  • Min. teeth large sprocket: 45T
  • Max. teeth small sprocket: 10T
  • Min. teeth small sprocket: 10T
  • Max. Front Difference: 10T
  • Total Capacity: 45T

Pulley cage

  • Type-SGS long


  • Aluminum
  • GFRP
  • Stainless steel
  • Steel


  • approx. 284g (manufacturer information)

Shimano XT CS-M8100 12-speed Cassette 10-45

The Shimano CS-M8100 is the suitable cassette for new XT 12-speed group. HYPERGLIDE+ drivetrain’s redesigned cassette and chain promotes the next generation of MTB riding by enhancing speed, shifting efficiency and smoothness over any terrain.


  • Gearing option 10-45T (12-speed rhythm step spec for Cross Country)
  • Hyperglide+ quicker shifting
  • Material Aluminium & steel
  • BEAM SPIDER construction Increased acceleration
  • MICRO SPLINE 10T lowest sprocket realized by new FREEHUB body construction

Product features

  • Use: MTB
  • Group: XT M8100
  • Model: CS-M8100-12
  • Type: Hyperglide+
  • Gear: 12-speed
  • Compatible chain: CN-M8100 12-speed


  • 10-45 (10-12-14-16-18-21-24-28-32-36-40-45 teeth)


  • Aluminium
  • Steel


  • approx. 461g (manufacturer information)

Shimano XT CN-M8100 12-speed Chain with Quick-Link

The special design of the new Shimano XT CN-M8100 12-speed chain ensures improved shifting performance and smoother running – even in rough terrain. The SM-CN910-12 Quick-Link closure, which is also new, makes installation easy.


  • New Drive System Dedicated Design Chain
  • Greater chain retention to extend portion on the end of inner plate to firmly hold the tooth both front and cassette sprocket
  • Enhancements to shifting performance
  • Easy connect
  • Smoother driving even over bumpy terrain
  • Compatible with new generation of drive train
  • Quick-Link (SM-CN910-12)
  • Quick-Link connecting & removing pliers (TL-CN10) – Not included!

Product features

  • Use: MTB, E-Bike
  • Group: XT M8100
  • Model: CN-M8100
  • Gear front: 1/2-speed
  • Gear rear: 12-speed
  • Type: HG
  • Hollow Pin: Yes
  • Pin Link Plate: SIL-TEC
  • Roller Link Plate: Chromizing
  • Roller: SIL-TEC
  • Connector: Quick-Link SM-CN910-12


  • XT M8100
  • SLX M7100
  • XTR M9100
  • 12-speed E-Bike


  • 126


  • approx. 252g / 116 Links (manufacturer information)
SKU: MTBG2020102552 Categories: ,