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Shimano XTR M9100 Groupset 1x12 Partial

Select Shimano XTR M-9100 12-spd Rear Shifter


Besides shifting gears, the Shimano XTR M9100 12-speed lever will shift your perception about performance as well. With 20% quicker lever access time and 35% less force needed Shimano has built the fastest cockpit ever. The 2-way release allows for instant push/pull movements, and the lightweight, ergonomic, compact design only weighs 117 grams.

  • Rear shifter
  • Weight: 117 grams
  • 12-speed
  • 35% lower shift effort
  • Multi / Instant and 2-Way release
Select Shimano XTR M-9120 1x12-spd R Derailleur


The Shimano XTR M9100 1x12-Speed Rear Derailleur is tight and precise, designed to withstand full force pedaling on the roughest trails, while shifting gears as smooth as ever. The new derailleur features a decreased tension at low gear position to prevent high chain tension, and adds a protective bumper at the cage for extra protection. A bigger 13T pulley reduces friction for a silent, better shifting drivetrain. GS: 1x compatible for 12-speed 10-45t cassettes. SGS: 1x compatible for 12-speed 10-45t and 10-51t cassettes.


  •  12-speed 
  •  GS: 1x compatible for 10-45t cassettes
  •  SGS: 1x compatible for 10-45t and 10-51t cassettes
  •  Weight: 241 grams
  •  Decreased rear derailleur tension at low gear position, to prevent high chain tension
  •  Low profile design 
  •  Light shift effort 
  •  Bumper added to rear pulley cage 
Select Shimano XTR 12-spd Cassette


Enhancing rider capabilities and providing more gearing combinations, the Shimano XTR M9100 12 Speed Cassette features two options to cover the diverse needs of elite level mountain bike riders and racers. The 12-speed cassette features Shimano's new MICRO SPLINE freehub technology that allows the use of 10-tooth cogs. The new design also allows for an aluminum freehub body construction that isn't damaged or gouged out by the cogs during use. The cassettes employ a new Beam Spider construction for improved power transfer, and are built with a strategic application of aluminum, titanium, and steel materials for an optimal blend of weight savings, rigidity, and durability. Building on Shimano's long history of shifting technology, the XTR M9100 delivers groundbreaking advancements in drivetrain performance with the introduction of HYPERGLIDE+. The newly redesigned CS-M9100 cassette guides the chain both up and down the cassette, providing faster, smoother shifting in both directions.Please note: only compatible with new Microspline hubs, these will not fit on traditional Shimano HG hubs.

10-51 Tooth 12-speed Wide Range offers 510% gear range
10-45 Tooth 12-speed Rhythm Step offers 450% gear range
Weight: 10x51 - 367 grams, 10x45 - 357 grams
10x51t: 10-12-14-16-18-21-24-28-33-39-45-51
10x45t: 10-12-14-16-18-21-24-28-32-36-40-45
Select Shimano XTR 12-spd Chain


Adding to XTR M9100's smooth drivetrain transmission, the Shimano XTR CN-M9100 HG chain features an extended inner link plate that connects seamlessly with the new chainring tooth shapes for Shimano's most efficient drivetrain. The new design reduces natural vibrations normally caused by the inner and outer chain plates rolling onto the chainring and provides better chain engagement, stronger retention, and smoother pedaling. Shimano's SIL-TEC surface treatment provides better mud shedding and increases chain life. Quick Link Included.

Weight: 242 grams
Speed: 12-Speed
Quick Link: Included


When trail conditions change drastically from one second to the next, mountain bikers need to be able to seamlessly adapt to the conditions and make changes in a split second. The partial 1x12 Shimano XTR M9100 groupset satisfies the needs of the most demanding riders by providing the highest level of precision and integration. Noted features include:

Greater flexibility and action-optimized cockpit layout
Quicker lever access and light operation force by new shifting system for rider’s concentration
Definitive HYPERGLIDE+ shifting lets you pedal continuously while shifting

The 1x12 Shimano XTR M9100 partial groupset includes: Shimano XTR M9100 rear derailleur, rear shift lever, 12-speed chain and 12-speed Micro Spline cassette. Please note: only compatible with new Micro Spline hubs, these will not fit on traditional Shimano HG hubs.