Shimano XT M8100 1×12-speed Group Clamp – MTB Group Sets


Shimano XT M8100 1×12-speed Group Clamp

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 1×12-speed Group Clamp

  • 1 Shimano XT FC-M8100-1 12-speed Crank without Chainring (choose variant crank arm length)
  • 1 Shimano XT SL-M8100 Clamp 12-speed Shift Lever right
  • 1 Shimano gear wire 2050mm and gear cable SIS OT-SP41 1800mm
  • 1 Shimano XT RD-M8120 (10-45) / RD-M8100 (10-51) 12-speed Rear Derailleur SGS
  • 1 Shimano XT CS-M8100 12-speed Cassette incl. Lock Ring (choose variant gradation)
  • 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 1×12-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-M8100-1 12-speed Crank without Chainring

The Shimano XT FC-M8100 1×12-speed crank with 172 mm Q-factor, 52 mm chainline and 142 / 148 mm O.L.D stands for highest drive efficiency at low weight. It offers optimum power transmission and maximum speed for the new XT system, which only use 1 chainring. 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 12-speed (FC-M8100/8120/8130-1). Most of them use 1-speed systems and a wide range of chainrings (28T to 36T) is available.

The new XT 1×12-speed cranks are characterised by DYNAMIC CHAIN ENGAGEMENT+ technology, whose special high-precision tooth profile ensures that the chain finds optimum grip on the upper part of the chainring on rough terrain, but detaches equally well from the chainring at the bottom, thus ensuring efficiency, smoothness and low noise of the drive. The cranks are equipped with a direct-mount system for quick and safe assembly of the chainrings, enabling chainrings to be changed in no time at all. The crank is available in boost and non-boost specifications.


  • FC-M8100-1 Q-Factor 172mm
  • Chain line 52mm
  • O.L.D 142mm / 148mm (Boost)
  • Compatibility 1×12-speed with CS-M8100 cassettes 10-45 and 10-51
  • Mounting system Direct mount (Lighter and stiffer design & easy exchangeable chainring by direct mount and one key release)
  • Chainring SM-CRM85 Available in different gradations (28-30-32-34-36) – Chainring is not included!

Product features

  • Use: MTB
  • Group: XT M8100
  • Model: FC-M8100-1
  • Gradation: Chainring is not included!
  • Q-Factor: 172mm
  • Threaded BB shell width: 68 / 73mm
  • Gear rear: 12-speed
  • Construction: Hollowtech II
  • Compatible Chain: CN-M8100 12-speed
  • Crank arms: 4 arm
  • O.L.D: 142mm / 148mm (Boost)
  • Chain line: 52mm

Crank Arm Length (choose variant)

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


  • Crank arm: Aluminum Anodized
  • Crank axle: Steel Plated


  • approx 608g with chainring (manufacturer information)

Shimano XT SL-M8100 Clamp 12-speed Shift Lever

The Shimano XT SL-M8100 12-speed Rapidfire Plus shift lever with clamp construction 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
  • 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-R
  • Shifter Type: Rapidfire Plus
  • Mounting: Clamp
  • 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. 125g (manufacturer information)

Shimano XT RD-M8120 (10-45) / RD-M8100 (10-51) 12-speed Rear Derailleur

The Shimano XT RD-M8120/RD-M8100 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.


  • Shadow RD+ For optimal chain retention
  • RD-M8120-SGS Works with 12-speed 10-45-teeth cassettes
  • RD-M8100-SGS Works with 12-speed 10-51-teeth cassettes

Product features

  • Use: MTB
  • Group: XT M8100
  • Model: RD-M8120/8100
  • Mount: Direct Mount
  • Technology: Shadow RD+
  • Gradations: SGS-Type
  • Compatible chain: CN-M8100 12-speed
  • Max. teeth large sprocket: 45/51T
  • Min. teeth large sprocket: 45T
  • Max. teeth small sprocket: 10T
  • Min. teeth small sprocket: 10T
  • Max. Front Difference: 0T
  • Total Capacity: 41/45T

Pulley cage

  • Type-SGS long


  • Aluminum
  • GFRP
  • Stainless steel
  • Steel


  • approx. 284g – RD-M8100 (manufacturer information)
  • approx. 290g – RD-M8120 (manufacturer information)

Shimano XT CS-M8100 12-speed Cassette

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 options 
    • 10-45T (12-speed rhythm step spec for Cross Country)
    • 10-51T (12-speed wide range spec for Enduro)
  • 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

Gradation (choose variant)

  • 10-45 (10-12-14-16-18-21-24-28-32-36-40-45 teeth)
  • 10-51 (10-12-14-16-18-21-24-28-33-39-45-51 teeth)


  • Aluminium
  • Steel


  • approx. 461g – 10-45 (manufacturer information)
  • approx. 470g – 10-51 (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: MTBG2020102549 Categories: ,