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Shimano XT FC-M8100-1 12-speed Crank without Chainring – 175mm

Product code4550170447953
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Shimano XT FC-M8100-1 12-speed Crank without Chainring

The Shimano XT FC-M8100 1×12-speed crank with 172 mm Q-factor, 52 mm chainline and 142 / 148 mm O.L.D stands for highest drive efficiency at low weight. It offers optimum power transmission and maximum speed for the new XT system, which only use 1 chainring.

The original mountain bike group continues its legacy: XT 1×12-speed Crank FC-M8100-1 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 12-speed (FC-M8100/8120/8130-1). Most of them use 1-speed systems and a wide range of chainrings (28T to 36T) is available.

The new XT 1×12-speed cranks are characterised by DYNAMIC CHAIN ENGAGEMENT+ technology, whose special high-precision tooth profile ensures that the chain finds optimum grip on the upper part of the chainring on rough terrain, but detaches equally well from the chainring at the bottom, thus ensuring efficiency, smoothness and low noise of the drive. The cranks are equipped with a direct-mount system for quick and safe assembly of the chainrings, enabling chainrings to be changed in no time at all. The crank is available in boost and non-boost specifications.

The original mountain bike group continues its legacy of remaining the standard for mountain bikerseverywhere. Nearly three decades in, the DEORE XT brand is defined by its trail-tested durability, reliability andperformance. 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.

Features – XT FC-M8100-1 12-speed Crank

    • FC-M8100-1 Q-Factor 172mm
    • Chain line:52mm
    • O.L.D142mm / 148mm (Boost)
    • Compatibility1×12-speed with CS-M8100 cassettes 10-45 and 10-51
    • Mounting system Direct mount (Lighter and stiffer design & easy exchangeable chainring by direct mount and one key release)
    • Chainring SM-CRM85 Available in different gradations (28-30-32-34-36) – Chainring is not included!

Product features

    • Use: MTB
    • Group: XT M8100
    • Model: FC-M8100-1
    • Gradation:Chainring is not included!
    • Q-Factor: 172mm
    • Threaded BB shell width: 68 / 73mm
    • Gear rear:12-speed
    • Construction: Hollowtech II
    • Compatible Chain:CN-M8100 12-speed
    • Crank arms: 4 arm
    • O.L.D:142mm / 148mm (Boost)
    • Chain line:52mm

Crank Arm Length (choose variant)

    • 165mm
    • 170mm
    • 175mm
    • 180mm


    • Crank arm: Aluminum Anodized
    • Crank axle: Steel Plated


    • approx 608g with chainring (manufacturer information)


SPECIAL GEAR TEETH FUNCTION SHIMANO’s DYNAMIC CHAIN ENGAGEMENT+ is a special gear teeth profile designed for use in single-chainring configurations for XC, enduro, and trail riding. It gives more chain retention and smoother pedaling – even over bumpy terrain. Chain retention of any gear will reduce abrasion and worn out.

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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