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Shimano XTR FH-MT901-B Rear Hub Micro Spline 12-speed 148mm CL black (2020)

ID: 994211
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Product Description

FH-MT901-B Rear wheel hub
With a huge flange spacing, a 32-hole option and Center Lock thru axle, the focus is on stiffness. The new FH-MT901-B thus offers the perfect basis for reliability and precision in every driving situation. The Micro Spline Design prevents the sprockets from cutting into the freewheel. The Scylence ratchet system in the freewheel ensures complete decoupling of the ratchets inside and thus minimises resistance and noise. The pressure angle of only 7° ensures an immediate frictional connection.

Shimano XTR M9100
The new XTR continues 27 years of MTB innovation with even more speed, focus and control. Do you want to push the boundaries on today's extremely challenging courses? The new XTR is packed with the technological edge you need. And it will inspire you to get the most out of you. Shimano has continued to work very hard since they launched the very first MTB group 27 years ago. The XTR is convincing proof of that. With its completely new design, it is by far the most advanced MTB group on the market. It is lighter, more comfortable, more robust and more versatile. It converts the rider's performance into propulsion with extreme efficiency.

MICRO SPLINE uses a lightweight FREEHUB cassette hub to reduce weight, with the largest chainring having 10 teeth. Use in combination with MICRO SPLINE cassette ring gear and FREEHUB.
* MICRO SPLINE patents pending

Advantages and features
Lightweight aluminum MICRO SPLINE FREEHUB can be seamlessly integrated with small upper 10-tooth pinions. Smaller and wider toothings prevent pinion damage on the FREEHUB, which is made of lightweight aluminium.

The silent SCYLENCE hub technology increases concentration while driving, improves stiffness and accelerates engagement.

Advantages and features
The faster engagement and higher stiffness ensure rapid acceleration and efficient power transmission. The noiseless freewheel and direct pedalling feel promote concentrated driving. Faster engagement and greater stiffness create a more direct pedalling feel. This promotes rapid acceleration and reduces unnatural distractions.

The CENTER LOCK system of the brake disc with multi-tooth profile and locking ring simplifies installation. This system of mounting by means of a circlip allows quick mounting and dismounting of the brake disc and thus saves service costs. In addition, the secure fit on the multi-tooth profile ensures greater precision and strength, which increases the effectiveness of the brake.


  • Offset: 6,63 mm
  • Only compatible with Micro Spline freewheel body
Operating Range
cassette hub  
Rear Wheel  
Cassette Compatibility
Bearing: cone bearing
Diameter Axle: 12 mm
Assembly Width: 148 mm
Waterproof Bearing: yes
Number of Holes to Spoke Flange: 32
Brake Type: disc brake centre lock
Axle: thru axle
Rear Hub
Shifting Compatible: cassette hub  
Bolt Hole Diameter (mm)
Left 59/ Right 61  
Flange Diameter (mm)
Left 68/ Right 70  
Flange Distance(mm)
258  g
Model year
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