Rounding out their 12-speed performance off-road lineup, Shimano just announced the new DEORE XT M8100 and SLX M7100 mountain bike component groupsets. These ranges incorporate key technologies from last year’s XTR M9100 group, such as Hyperglide+ and DCE+ chain technology and four-piston braking. Find highlights here, along with details, weights, and pricing…

Posted by Lucas Winzenburg

In a major announcement, Shimano launched all-new DEORE XT and SLX 12-speed groupsets this morning, greatly expanding their range and bringing many of their XTR technologies to a more affordable pricepoint. Here’s an overview of both groups, featuring highlights that we think bikepackers might find interesting. Shimano DEORE XT M8100 will be available on complete bikes and at bicycle retailers beginning June 14th, 2019, and Shimano SLX M7100 will be available on complete bikes at bicycle retailers beginning in July 2019.

Shimano DEORE XT Drivetrain

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 unrivaled component customization and Shimano’s widest range 1×12 gear options with its 12-speed 10-51T cassette. Where new XTR M9100 is for racing, DEORE XT M8100 is definitively trail focused, from wide rims to trail-tuned brakes and gearing options with ergonomics that prioritize comfort and control.

Shimano DEORE XT Cranksets

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.

Shimano XT Hollowtech II Crankset

FC-M 8100-1, FC-M8120, and FC-M8130-1 Cranksets

  • Single front chainring
  • Chainring options: 28, 30, 32, 34, 36T

Three Q-Factor and chain line options:

  • FC-M8120-1: 178mm Q-Factor, 55mm chain line works with 148 O.L.D.
  • FC-M8130-1: 181mm Q-Factor, 56.5mm chain line works with 157 O.L.D.
  • FC-M8100-1: 172mm Q-Factor, 52mm chain line works with 142 or 148 O.L.D.

Shimano XT Hollowtech II Crankset

FC-M8100-2 and FC-M8120-B2 Cranksets

  • Double front chainring setup
  • Swappable between single and double chainrings
  • Chainring combination: 36-26T
  • Chainline: 48.8mm (FC-M8100-2): 172mm Q-Factor / 51.8mm (FC-M8120-B2): 178mm Q-Factor

Shimano DEORE XT Derailleurs

SHIMANO DEORE XT M8100 features two rear derailleurs that enhance shifting performance for both single and double front chainring setups. The derailleurs feature larger 13-tooth pulleys and include Shimano’s proven Shadow RD+ low profile technology.

Shimano XT Rear Derailleur

RD-M8100-SGS Rear Derailleur for 1x Setup

  • For single front chainring setup
  • 51T max cog size
  • Works with both 10-51 and 10-45-tooth cassettes
Shimano XT Rear Derailleur

RD-M8120-SGS Rear Derailleur for 2x Setup

  • Designed for double front chainring setup
  • 45T max cog size
  • Compatible with 2×12 speed or 1×12 with 10-45 cassette

FD-M8100-D/E/M Front Derailleur

Continuing SHIMANO’s leadership in front derailleur technology and performance, DEORE XT M8100 delivers the new FD M8100-D/E/M side swing front derailleur with three mounting options.

Shimano XT Front Derailleurs, FD-M8100

  • SIDE SWING front derailleur
  • D, E, and M-type mounts
  • 10T total capacity
  • 48.8mm and 51.8mm chain lines

Shimano DEORE XT Shifters

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.

  • Shimano XT Right Shift Lever
  • Shimano XT Right Shift Lever

SL-M8100-IR and SL-M8100-R – Right Shift Levers

  • MULTI RELEASE allows the release of two gears at a time
  • 2-WAY RELEASE with instantaneous push and pull movements
  • Textured rubber pad on lever for grip
  • 14mm slide range and 20-degree rotation for I-SPEC EV (SL-M8100-IR)
  • Shimano XT Left Shift Lever
  • Shimano XT Left Shift Lever

SL-M8100-IL and SL-M8100-L – Left Shift Levers

  • Front double shifting with single lever design
  • 2-WAY RELEASE with instantaneous push and pull movements
  • Textured rubber pad on lever for grip
  • Natural finger position and intuitive shifting operation

Shimano DEORE XT Brakes

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.

Shimano XT Brake Lever

BL-M8100 Brake Lever

  • One XT brake lever for both 2-piston and 4-piston brake calipers
  • Quick brake engagement with shorter free stroke
  • Optimized lever axle position
  • Refined ergonomics featuring a taller and flatter lever blade face
  • Shimano XT Brake Rotor
  • Shimano XT Brake Rotor

BR-M8100 – 2-piston brake caliper

  • Inboard banjo housing routing for clean setup

BR-M8120 – 4-piston brake caliper

  • Inboard banjo housing routing for clean setup
  • Shimano XT Rotor
  • Shimano XT Rotor
  • Shimano XT Rotor

RT-MT800 – ICE-TECHNOLOGIES FREEZA Rotors

  • Boosts heat dissipation bringing FREEZA technology to the XT group for the first time
  • Reduces fade
  • 140mm, 160mm, 180mm, and 203mm

Shimano DEORE XT Wheelsets

Shimano XT Wheelset

Shimano’s new DEORE XT wheels deliver value and reliability for riding on all types of terrain. For lighter trail riding, the WH-M8100-TL aluminum wheels feature straight pull spokes and 24mm rims. The WH-M8120 pairs an extra wide-flange hub with an offset rim to create a zero-dish wheel. With wider rims and J-bend spokes, the result is a wheel with incredible handling that’s easy to service for aggressive trail riding. Both wheelsets are available in 27-inch and 29-inch wheel sizes.

WH-M8100-TL – Lightweight tubeless wheels

  • 28 straight pull spokes
  • Inner rim with 24mm for use with tires up to 2.35″
  • E-THRU – 110 mm and 148 mm O.L.D.

WH-M8120-TL – Wider and stiffer wheels

  • Zero Dish
  • 28 J-bend spokes
  • 30mm inner rim width for tires up to 2.6″
  • E-THRU – 110 mm and 148 mm O.L.D.

Shimano DEORE XT Weight/Pricing

Shimano Deore XT Pricing

Shimano SLX Drivetrain

After setting the benchmark in mountain bike components with SHIMANO XTR M9100 and new DEORE XT M8100, Shimano rounds out its now entirely 12-speed performance mountain bike component lines with new SLX M7100. SLX M7100 cascades technology from new XTR M9100 and DEORE XT M8100 – namely Shimano’s signature premium shifting and braking performance – while maintaining the SLX hallmark of value and durability. Shimano SLX M7100 is available on complete bikes at bicycle retailers beginning in July 2019.

Employing the technological innovations found throughout XTR M9100 and DEORE XT M8100, new SLX components also have significant refinements to longstanding Shimano technologies that enhance riding performance and reliability for a broader range of riders.

The new 12-speed SLX M7100 drivetrain offers wide range and rhythm step cassettes with single and double front chainrings and delivers Shimano’s widest range 1×12 gear option with the new 10-51T SLX cassette. Additionally, Shimano refined chain line specifications for SLX M7100 including a 55mm chain line, ensuring that the drivetrain is optimized for a greater variety of frame designs.

Shimano SLX Cranksets

Shimano SLX Crankset

FC-M7100-1, FC-M7120 and FC-M7130-1 Cranksets

  • HOLLOWTECH II construction
  • Single front chainring
  • Chainring options: 30, 32, 34T

Three Q-Factor and chain line options:

  • FC-M7100-1: 172mm Q-Factor, 52mm chain line works with 142 or 148 O.L.D.
  • FC-M7120-1: 178mm Q-Factor, 55mm chain line works with 148 O.L.D.
  • FC-M7130-1: 181mm Q-Factor, 56.5mm chain line works with 157 O.L.D..

Shimano SLX Crankset

FC-M7100-2 and FC-M7120-B2 Cranksets

  • HOLLOWTECH II construction
  • Double front chainring setup
  • Swappable between single and double chainrings
  • Chainring combination: 36-26T
  • Chainlines: 48.8mm (FC-M7100-2): 172mm Q-Factor / 51.8mm (FC-M7120-B2): 178mm Q-Factor

Shimano SLX Derailleurs

Shimano SLX Rear Derailleur

RD-M7100-SGS Rear Derailleur for 1x Setup

  • For single front chainring setup
  • 51T max cog size
  • Works with both 10-51 and 10-45-tooth cassettes

RD-M7120-SGS Rear Derailleur for 2x Setup

  • Designed for double front chainring setup
  • 45T max cog size
  • Compatible with 2×12 speed or 1×12 with10-45 cassette

FD-M7100-D/E/M Front Derailleur

Shimano SLX Front Derailleur

  • SIDE SWING front derailleur
  • D, E, and M-type mounts
  • 10T total capacity
  • 48.8mm and 51.8mm chain lines

Shimano SLX Shifters

  • Shimano SLX Shift Lever
  • Shimano SLX Shift Lever

SL-M7100-IR and SL-M7100-R – Right Shift Levers

  • Ergonomics focused on comfort and control
  • 2-WAY RELEASE with instantaneous push and pull movements
  • Shimano SLX Shift Lever
  • Shimano SLX Shift Lever

SL-M7100-IL and SL-M7100-L – Left Shift Levers

  • Front double shifting with single lever design
  • 2-WAY RELEASE with instantaneous push and pull movements

Shimano SLX Brakes

Expanding SHIMANO’s legendary mountain bike braking technology to more riders, SLX increases braking performance and includes both 2-piston and 4-piston calipers to deliver the right amount of power for a variety of terrain and riding styles.

The SLX M7100 brake levers are designed after XTR M9100 and DEORE XT M8100 with more inboard clamp position and added bracing for increased efficiency and control. The new design minimizes impact on cockpit real estate, creating space between the clamp and support point for mounting other handlebar accessories.

Shimano SLX Brake Lever

BL-M7100 Brake Lever

  • One SLX brake lever for both 2-piston and 4-piston brake calipers
  • Quick brake engagement with shorter free stroke
  • Optimized lever axle position and refined ergonomics
  • Shimano SLX Brake Caliper
  • Shimano SLX Brake Caliper

BR-M7100 – 2-piston brake caliper

  • Inboard banjo housing routing for clean setup

BR-M7120 – 4-piston brake caliper

  • Inboard banjo housing routing for clean setup

Shimano SLX Weight/Pricing

Shimano SLX Pricing

We’ll be sure to update this post with additional details and photos as they’re available. And stay tuned, as we hope to get one or both groupsets in for review before long!

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