The Shimano XT FC-M8120 2×12-speed Boost crank with 178 mm Q-factor, 51.8 mm chainline and 148 mm O.L.D offers maximum drive efficiency at low weight. In combination with the 10-45 tooth cassette, it delivers an incredible transmission bandwidth! The perfect set-up for long races and hard climbs.
The original mountain bike group continues its legacy: XT 2×12-speed Boost Crank FC-M8120-B2 from Shimano
In addition to a new special 12-speed chain (CN-M8100) with the corresponding new 12-speed QUICK LINK lock, SHIMANO is also equipping the XT M8100 with new cranksets for 2×12-speed  (FC-M8100-2/8120-B2).
For those who are drawn to unknown terrain, our 2×12 crank option offers the ultimate range for all eventualities. The chainring gradation of 36-26T in combination with the 10-45T cassette offers almost unlimited possibilities to tackle every imaginable terrain while keeping the cadence constant through low gear jumps.
The original mountain bike group continues its legacy of remaining the standard for mountain bikers everywhere. Nearly three decades in, the DEORE XT brand is defined by its trail-tested durability, reliability and performance. Recognizing that today’s mountain bikers are riding faster and confidently on more technical terrain, the legacy of DEORE XT is more important than ever. In 2019, our pinnacle mountain bike technologies will trickle down to SHIMANO DEORE XT M8100.Â
Features – Shimano XT FC-M8120-2 12-speed Boost Crank 36/26
- FC-M8120-B2 Q-Factor 178mm
- Chain line:Â 51.8mm
- O.L.DÂ 148mm (Boost)
- Compatibility 2×12-speed with CS-M8100 cassettes 10-45
- Mounting system Direct mount (Lighter and stiffer design & easy exchangeable chainring by direct mount and one key release)
Product features
- Use: MTB
- Group: XT M8100
- Model: FC-M8120-2
- Gradation:Â 36-26T
- Q-Factor: 178mm
- Threaded BB shell width: 68 / 73mm
- Gear front: 2-speed
- Gear rear:Â 12-speed
- Construction: Hollowtech II
- Compatible Chain:Â CN-M8100 12-speed
- Crank arms: 4 arm
- O.L.D:Â 148mm
- Chain line:Â 51.8mm
Crank arm length (choose variant)
- 165mmÂ
- 170mm
- 175mm
- 180mm
MaterialÂ
- Crank arm: Aluminum Anodized
- Crank axle: Steel Plated
- Large Chainring: Aluminum
- Small Chainring: Aluminum
Weight
- approx. 654g (manufacturer information)
Scope of delivery
- 1 x Shimano XT FC-M8120-2 12-speed Boost Crank 36/26
Technologies
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. High Precision Sealing Moreover, HOLLOWTECH II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.














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