Shimano XTR FC-M9000 Race 11-Speed Double Chainset

Class-leading XTR Race 11-speed Dyna-Sys chainset, integrating the bottom bracket and chainset into a strong,
rigid, yet lightweight unit.

The Shimano XTR FC-M9000-2 employs all of Shimano’s top crank and chainring technologies resulting in a lightweight,
durable, and efficient crank that is at home on the race course. The Race crank uses a hollow cavity bonded
construction on the left crankarm while the right side uses interchangeable XTR chainrings, making it convertible
from 1x to 2x. With a narrow 158mm Q-factor, the FC-M9000-2 is available with 38-28, 36-26, and 34-24T chainrings
and in 170 and 175mm crank arm lengths.

Technology

HollowGlide

Hollow technology on outer chainring. High rigidity hollow structure cuts down on weight yet maintains strength.
Better power transfer and quicker and more precise front shifting.

Dyna-Sys 11

Rhythm and range, the real advantage of 11-speed is the ability to have all the range you require without sacrificing
the rhythm you need.

Range Optimized Chainwheels

Chainwheels matched with specific sprockets for:

• Improved gear quality and driving efficiency
• Reduced cross-chain
• Effective gear steps
• Larger diameter, longer wearing cogs

At the range

Driving: gears are purpose matched to keep you riding efficiently without front shifting

Climbing: gears are chosen to compliment the lowest cogs and maximize seated traction

Driving range

Dyna-Sys 11 maximizes rhythm with “rhythm step” gears in the most frequently used range.

• Less front shifting thanks to optimum front gear teeth
• Rider controls cadence and energy use by rear close ratio

Highly Efficient gear combination

Driving efficiency is a key drivetrain performance indicator.

• More speed for the same effort
• Multiple front gear (2x, 3x) maintains higher efficiency in all range

Gear Ratio

M9000 series

Front double 36-26 Tooth, Cassette sprocket 11-40 Tooth / Front single 30 Tooth, Cassette sprocket 11-40
Tooth

HG-X11 Chain

Silky driving, accurate shifting HG-X11 directional chain realize more smoother shifts and greater overall
performance.

Right and left sides are optimized for front and rear shifting respectively.

HollowTech Crank Arm

A lightweight crankset not only reduces the bike’s weight, but decreases rotating mass to aid in acceleration. The
challenge is to reduce the weight of the crank without reducing its strength and rigidity.

Shimano’s advanced forging technology has solved the problem through the HollowTech crank.
Just like high quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very
lightweight.

HollowTech II

Providing the best balance of stiffness, strength, weight and rotating performance.

The concept of HollowTech II technology is focused on producing a superior crankset which will maximize a rider’s
power transfer. The rigidity of the crankset ensures pedaling efficiency while its weight, a key element of the
crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. Naturally,
Shimano strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight
crank. HollowTech technology is an ultra-lightweight hollow crankarm created by Shimano with the company’s own
proprietary forging technology that also maintains rigidity. The addition of HollowTech II technology integrates the
bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional
balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability,
allowing for more efficient power transfer.

The HollowTech II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance
in a lightweight and beautiful crankset design. Moreover, HollowTech II crankset has a high-precision sealing in the
bearing area to increase durability maintaining the excellent rotating performance for long periods.

24mm Diameter Axle And Bearings

Why choose the 24mm axle and bearings for the HollowTech II crankset?

The diameter of the Bottom Bracket axle and bearings was of primary importance for the development because the Bottom
Bracket axle area is tied to such key elements as stiffness, strength, weight and rotating performance.

What’s important is the total balance of crankset

In addition, taking the crankset as a whole, the total balance of crankarm rigidity, axle stiffness, bearing position
and others is essential. Indeed, the crankset is designed by careful consideration of the total balance of those
elements to prevent breakage.

Outboard Bearing

For most frames with 68mm Bottom Bracket shells, HollowTech II with 24mm axle can set the bearing position outside of
the frame to provide better weight distribution and more stability.

24mm Diameter Axle And Bearings Provide Optimum Balance For The Crankset

After studying all these problems thoroughly, we made the decision to adopt the 24mm diameter axle and bearings,
which have the optimum balance, for the HollowTech II crankset.

In addition, an examination of the total crankset, including the crankarm and gears, proves the optimum balance of
rigidity, weight and rotating performance for the ultimate transfer of power to your bike. HollowTech II is simply
the most optimized crankset design on the market.

Features

• Integrated design makes installation and adjustments easier than ever
• Precision bottom bracket bearings are spaced further apart, and are therefore more stable and longer lasting
  than conventional bottom brackets
• XTR Race chainset uses hollow-bonded construction for the L/H crank arm, shaving vital grams where possible
• Easy to use splined bottom bracket spindle connection provides a rigid and secure interface between crank and
  spindle
• 34/24 with a 48.8mm chain line and a 158mm Q-factor ideally suited for XC Race use in conjunction with 11-40T
  cassette
• Hollowglide outer chainring is made with a titanium/aluminium composite hollow 3D structure to maximize
  stiffness whilst keeping weight at a minimum
• Titanium teeth are used to create a stiff, light weight and hard-wearing chainring
• Compatible with all new XTR chainrings
• Compatible with 2x and 1x set-ups
• Can be used for use with 11-speed HG-X chains only
• Average weight 640g (without BB)