Product Details

The elegantly designed XTR FH-M9111 Boost 12-speed Micro-Spline rear hub from Shimano offers the well-known reliability and performance with a new, lightweight bearing and axle system. 

• Increased acceleration by reducing inertia and weight
• New smaller spline diameter for 10T top gear
• Quick engagement: 9 deg max
• Faster acceleration
• Only compatible with Shimano Micro-Spline cassettes!
• Gear: 12-speed
• Cassette mount: Micro-Spline 
• Brake type: Center-Lock Disc

Material

• Hub: Aluminum Anodized 
• Axle: Aluminum
• Freehub body: Aluminum Anodized 

Weight

• 238g (manufacturer information)

Micro-Spline

MICRO SPLINE delivers lightweight aluminum FREEHUB body to reduce weight and 10 teeth top gear. Use combination with MICRO SPLINE cassette sprocket and FREEHUB.

• Lightweight aluminum MICRO SPLINE FREEHUB seamlessly integrates with small 10-tooth top gears.
• Smaller and more widely distributed splines limit cog damage on lightweight aluminum FREEHUB.

About Shimano
Established in Japan in 1921, Shimano is the worlds largest bicycle component manufacturer. Whether it be drive systems, brakes, pedals or shoes, Shimano stands for reliable quality and performance. From Road & Gravel to Mountain, Touring & Urban use, Mechanical or Electric.