Shimano XTR M9100 XC Race Groupset 2x12-speed

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Description of Shimano XTR M9100 XC Race Groupset 2x12-speed


Back to where it all started.

The Shimano XTR M9100 group was developed to meet the demands of mountainbike racers at the highest level and guarantees "second to none" performance. The range offers the most versatile components for XC, Enduro and Marathon races.

It all started with the search for the ultimate MTB racing components and now the XTR continues 27 years of innovation with even more speed, focus and control. It is jam-packed with the technological advantages needed to push the boundaries of today's insanely demanding courses. It is lighter, smoother, more durable and versatile to transfer all pedal-pounding watts into ground speed with extreme efficiency.


The Shimano XTR M9100 groupset consists of:

  • XTR BL-M9100 XC Race brake lever (left + right)
  • XTR BR-M9100 XC Race disc brake calipers (Post Mount, front + rear)
  • XTR SL-M9100-I shift lever (I-Spec EV, right)
  • XTR FC-M9100-2 XC Race crankset
  • XTR RD-M9120-SGS Shadow RD+ rear derailleur - long
  • XTR CS-M9100-12 cassette
  • XTR CN-M9100 chain (with Quick Link)

Hubs, brake discs and bottom bracket cups are not included. These can be ordered separately.


Shimano XTR BL-M9100 XC Race brake lever

The Shimano engineers have redesigned the XTR 9100 brake levers from a braking system that had been already the benchmark among mountainbike braking systems. For the BL-M9100 levers both the clamp and the lever body itself have been modified. The clamp moves further into the middle of the lever and is angled. This cleverly supports the outer end of the expansion tank directly on the handlebars and creates an additional counter bearing for lever actuation.

This significantly increases stiffness and stability, what ultimately leads to an even more direct brake feeling and improved control. So the BL-M9100 is 10 % stiffer than its predecessor, too. Of course, the reach of the lightweight XC brake lever with a magnesium housing is individually adjustable. Thanks to the I-Spec EV design the XTR SL-M9100-I shifting levers can be mounted directly to the brake lever.

Shimano XTR BR-M9100 XC Race disc brake caliper

The Shimano XTR BR-M9100 brake caliper has a one-piece aluminium construction and ensures significantly faster response and less free travel of the entire brake system when combined with the highly rigid braking cables. The K02Ti Resin brake pads with titanium carrier plates or the K04S Metal brake pads in combination with the 2-piston caliper guarantee extremely good deceleration and low weight at the same time.

Shimano XTR SL-M9100 Rapidfire Plus (Mono) shifting lever

The target of the Shimano XTR SL-M9100 shift lever's development was to enable the driver to react immediately to sudden changes caused by the track or the racing situation. In addition, the intuitive operation of the XTR 9100 handlebar elements has once again been significantly optimized, which can mean the decisive tenths of a second of advantage in racing. The special focus which the developers have placed on shifting ultimately benefits the driver by allowing him to focus away from the controls and completely on the racing action. In addition the developers have implemented shifting levers with significantly lower leverage and travel so that mountainbikers can operate their system intuitively and seamlessly with minimal finger movements.

With the I-Spec EV design Shimano shifting levers can be mounted directly to the brake lever, what makes it possible to dispense with a clamp and significantly increase the adjustment range. I-Spec EV allows 14 mm for longitudinal and 60° for rotational adjustment so that each rider can make a setup to suit his or her individual anatomy or preferences.

Proven features such as Rapidfire Plus, 2-Way-, Instant- and Multi-Release have of course been adopted by the SL-M9100 shifting levers from its predecessor. On the other hand, a mode converter has been added to the right-hand lever for switching from 12-speed to 11-speed. On the other hand, the left Rapidfire Plus Mono gear lever for 2-speed systems is a completely new development in which both the large and small chainrings are shifted with just one lever. The lever is pressed forward with the thumb to shift up, but does not spring back afterwards as before, but remains locked in this position. To shift down to the small chainring, simply release this lock by pressing it again with your thumb or by pulling it with your forefinger.

Shimano XTR FC-M9100-2 XC Race crankset

The hollow forged Shimano XTR FC-M9100 2x12-speed crankset pairs nicely with the XTR 9100 10-45T cassette for maximum gear range and closes gear steps for long races with lots of climbing. Chainrings are direct mount for weight reduction and improved power transfer. It also makes it easy to switch out your rings when needed.

With a 162 mm Q-factor the FC-M9100 is ideal for Cross Country and Marathon use.

Shimano XTR FD-M9100 Side Swing front derailleur

The Shimano XTR FD-M9100 front derailleur's side swing mechanism ensures smooth shifting. The FD-M9100 adapts chain lines between 48.8 and 51.8 mm and is therefore also compatible with Boost O.L.D. The XTR 9100 front derailleur is available as E-Type (FD-M9100-E) and Direct Mount (FD-M9100-D) version as well as for the middle clamp position (FD-M9100-M).

Shimano XTR RD-M9120-SGS Shadow RD+ rear derailleur

The Shimano XTR RD-M9120 rear derailleur features an elegant yet aggressive angled design and attractively anodized aluminium surfaces. Large guide and tension pulleys with 13 instead of 11 teeth provide improved shifting performance. These contribute to the improvement of chain stabilization as well as the Shadow RD+ design with friction dampers.

In the small gears, a lower preload ensures that excessive chain tension is avoided. An additional stop on the rocker arm ensures a XTR 9100 low-noise drive. Unlike the RD-M9100 rear derailleur, the RD-M9120 is designed to work optimally with the XTR 2-speed drivetrain.

Shimano XTR CS-M9100-12 cassette

It feels like magic. With the XTR CS-M9100 Shimano has increased the transmission ratio, made the cassette even stronger and 30 % stiffer - and all this at an even lower weight. The secret is an intelligent use of titanium, aluminium and steel. This mixture obtains the best balance of weight and durability.

The starting point for a new development in drivetrain was the goal of implementing as few shifting steps as possible so that cadence jumps during shifting remain low, rhythm and propulsion are maintained and, ultimately, speed is kept high. This resulted in the large pinion with 51 teeth (only for 1x12-speed drivetrain), which maintains the uniform difference of 6 teeth per gear, especially in the small gears. In addition, the XTR 9100 also comes with a 10-45 teeth cassette, which allows even finer or narrower gradation between the gears on faster or less steep racing courses.

This makes the 10-45 teeth cassette ideal for XC racers, where narrow gradations are crucial and every gram counts, while the 10-51 teeth cassette is the ideal choice for trail riders who can also tackle steep ramps.

Shimano XTR CN-M9100 chain

The Shimano CN-M9100 chain is especially designed for the use with the XTR M9100 drivetrain system. The Dynamic Chain Engagement+ technology, which also determines the design of the XTR 9100 chainrings, ensures an excellent hold of the chain on chainrings and sprockets. For improved shifting performance, the chain has also been matched to the Hyperglide+ cassettes. Last but not least it features the proven SIL-TEC coating.


If you need more detailed information about the single parts of the groupsets check the articles in the referring categories.



Manufacturer's item codes:

  • brake system: IM9100KLFPRA100 | IM9100KLFPMA100 + IM9100KRRXRA170 | IM9100KRRXMA170
  • shifting lever: ISLM9100IPA
  • crankset: IFCM91002CX88 | IFCM91002EX88
  • front drailleur: IFDM9100D6 | IFDM9100E6 | IFDM9100MX6
  • rear derailleur: IRDM9120SGS
  • cassette: ICSM9100045
  • chain: ICNM9100116Q | ICNM9100126Q | ICNM9100138Q
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Fact Sheet of Shimano XTR M9100 XC Race Groupset 2x12-speed

Product Name: Shimano XTR M9100 XC Race Groupset 2x12-speed
Manufacturer: Shimano Parts
Item Code: SHI384032
Manufacturer item code: see description
Material: aluminum, carbon fiber reinforced polymer (CFRP)
Derailleur: Shimano 2x12-speed
Derailleur short/long: long
Derailleur, max. number of teeth: 45 teeth
Capacity of derailleur: 41 teeth
Included in delivery: see description
brake system filled and bleed
without brake discs, bottom bracket cups and hubs
Crank length: 170 ||| 175
Chainwheel, number of teeth: 38-28 teeth
Nuance of sprocket / Gearing: 10-12-14-16-18-21-24-28-32-36-40-45
Material of sprocket: large sprockets, spider, lockring: aluminum
medium sprockets: titanium
small sprockets: steel
Version of front derailleur: Side Swing
Bracket, profile of axle: Hollowtech II (integrated axle, 24 mm)
Derailleur max. number of teeth: 38 teeth
Manufacturer page: http://www.shimano-europe.com/
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Item includes
Still 10+ in stock in stock, delivery time 13-15 days Shimano XTR SL-M9100 Rapidfire Plus Shifting Lever - I-Spec EV - 2x11/12-speed - Pair
Still 10+ in stock in stock, delivery time 13-15 days Shimano XTR RD-M9120-SGS Shadow RD+ Rear Derailleur - long - 2x12-speed
Still 6 in stock in stock, delivery time 13-15 days Shimano XTR CS-M9100-12 Cassette 12-speed – Sprocket Ratio 10-45
Selection: Shimano XTR BR-M9100 + BL-M9100 XC Race Disc Brake - I-Spec EV - front
Still 10+ in stock in stock, delivery time 13-15 days Brake Pads K02Ti Resin
Still 10+ in stock in stock, delivery time 13-15 days Brake Pads K04S Metal
Selection: Shimano XTR BR-M9100 + BL-M9100 XC Race Disc Brake - I-Spec EV - rear
Still 10+ in stock in stock, delivery time 13-15 days Brake Pads K02Ti Resin
Still 10+ in stock in stock, delivery time 13-15 days Brake Pads K04S Metal
Selection: Shimano XTR FC-M9100-2 XC Race Crankset 2x12-speed
Still 9 in stock in stock, delivery time 13-15 days Crank Arm Length 170 mm
Still 9 in stock in stock, delivery time 13-15 days Crank Arm Length 175 mm
Selection: Shimano XTR FD-M9100 Side Swing Front Derailleur - 2x12-speed - Front Pull
Still 8 in stock in stock, delivery time 13-15 days Model - Installation FD-M9100-D - Direct Mount
Still 8 in stock in stock, delivery time 13-15 days Model - Installation FD-M9100-E - E-Type (without BB Plate)
Still 2 in stock in stock, delivery time 13-15 days Model - Installation FD-M9100-M - Mid Clamp
Selection: Shimano XTR CN-M9100 Chain 11/12-speed - with Quick Link
Still 10+ in stock in stock, delivery time 13-15 days Number of Links 116
Still 10+ in stock in stock, delivery time 13-15 days Number of Links 126
Still 10+ in stock in stock, delivery time 13-15 days Number of Links 138
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