Shimano FC-M8000 Deore XT Crankset - 2x11 Speed

Description

SHIMANO DEORE XT - HOLLOWTECH II - MTB Crankset - 2x11-speed

The SHIMANO DEORE XT FC-M8000-2 crankset provides an optimal balance between durability and weight. Perfect for a wide range of MTB disciplines, this 2x11 speed crank is offered with 38-28, 36-26, and 34-24T composite chainrings. These close-step ratios ensure maximum cadence control on varying terrain.

Features

• FC-M8000-2 double crankset
• Crank Arms: HOLLOWTECH II Technology
• Improved driving rigidity
• Loose ratio gear combination for minimum shifting gap and maintaining rhythm
• New 3D composite chain ring's teeth composition is optimized for each chainwheel load out (1x11, 2x11 & 3x11) with steel driving gear teeth and aluminum support gears
• Better sealing and better rotation
• Spindle: 24mm spindle
• Cassette Compatibility: 2x11 Speed
• Bolt Circle Diameter: 96mm asymmetrical 4-bolt
• Chainline: 48.8mm
• BB Shell Width: 68/73mm
• Bottom bracket sold separately
• Chainrings: Choose 26/36T or 24/34T
• 96/64mm x 4 Bolt B.C.D.
• Crank arm length: Choose 170mm or 175mm
• Color: Black

Technology

Dyna-Sys11

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.

Wider Driving Range / Total Range Gear Range Comparison

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-SYS11 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

Climbing range

DYNA-SYS11 maximizes rhythm with “rhythm step” gears in the most frequently used range.

• Smooth shifting performance thanks to front close gear ratio
• 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 36-26T, Cassette sprocket 11-40T / Front single 30T, Cassette sprocket 11-40T

HG-X11

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 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.

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.

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.

Specifications

Rear speeds			11
Compatible chain			HG-X11
Chainline (mm)			48.8
P.C.D. (mm)			96/64
Gear arms			4 arm
Chainring combination			38-28T 36-26T 34-24T
Q-factor (mm)			176
Crank arm length (mm)	165.0		X
	167.5		-
	170.0		X
	172.5		-
	175.0		X
	177.5		-
	180.0		X
Optional chain guard	With bash guard		-
	With chain guard		-
	Without chain / bash guard		X
HOLLOWTECH II			X
2-PIECE CRANKSET			-
HOLLOWTECH crank arm			-
OCTALINK			-
HOLLOWGLIDE			-
Compatible BB type	Outboard		X
	OCTALINK		-
	Square		-
Recommended BB	Threaded (normal)		BB-MT800
	Threaded (E-type)		-
	Threaded (chain case)		-
	Pressfit		BB-MT800-PA
Axle length of BB-UN / ES (mm)	Threaded (normal)		-
	Threaded (E-type)		-
	Threaded (chain case)		-
Threaded BB shell width	68mm		X
	73mm		X
	83mm		-
Chain case compatible			-
Crank arm	Material		Aluminum
	Finish		Anodized
Crank axle	Material		Steel
	Finish		Plated
Spider arm	Material		Aluminum
	Finish		Painted
Outer ring	Material		Aluminum / CFRP
	Finish		Plated(teeth), Painted(body)
Inner ring	Material		Aluminum
	Finish		Plated
Outer / middle ring fixing bolt	Material		Aluminum
	Finish		Anodized
Inner ring fixing bolt	Material		Stainless steel
Crank fixing bolt included			X
Average Weight (175mm, w/o BB)			738.9 g (38-28T) 718.1 g (36-26T) 695.5 g (34-24T)