Shimano Deore XT Crankset FC-M8100 1x12-Speed (170mm)

SHIMANO DEORE XT - HOLLOWTECH II - MTB Crankset - 172mm Q-Factor - 52mm Chainline - 1x12-speed

The Shimano XT FC-M8100 1 x 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 new XT 1x12-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 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.

Key Features

• Speed Compatibility: 1x12-speed drivetrain

• Crank Length: 170 mm

• Technology: HOLLOWTECH II lightweight hollow forged crank arms

• Chain Engagement: DYNAMIC CHAIN ENGAGEMENT+ tooth profile

• Q-Factor: 172 mm

• Chainline: 52 mm

• Mount Type: Direct-mount chainring system

• Frame Compatibility: 142 mm / 148 mm O.L.D (Boost compatible)

• Construction: Rigid and lightweight design for aggressive MTB riding

• Performance Benefit: Improved chain retention and smoother drivetrain operation

Product Specifications

• Model: FC-M8100-1

• Series: Shimano Deore XT

• Speed: 12-Speed

• Crank Length: 170 mm

• Q-Factor: 172 mm

• Chainline: 52 mm

• Chainring Mount: Direct Mount

• Bottom Bracket Type: HOLLOWTECH II

• Drivetrain Type: Single chainring (1x system)

• Recommended Frame O.L.D: 142 mm / 148 mm

• Material: Hollow forged aluminum crank arms

• Bottom Bracket Included: No

• Chainring Included: No

Performance & Power Transfer

• HOLLOWTECH II Construction: Hollow forged crank arms reduce weight while maintaining excellent stiffness for efficient power transfer

• Optimized Pedaling Efficiency: Designed to deliver consistent power delivery for modern trail and cross-country riding

• Stable Drivetrain Operation: 52 mm chainline improves alignment for smoother shifting and drivetrain performance

• Aggressive Trail Capability: Rigid structure supports strong pedaling forces during steep climbs and fast descents

• High-Speed Performance: Built to support modern MTB riding styles with improved control and acceleration

Why Choose This Product

• Trusted Shimano Deore XT quality and performance

• Lightweight yet extremely durable crank design

• Excellent chain retention for rough trail riding

• Direct-mount system allows quick chainring replacement

• Optimized for modern 1x12-speed mountain bike drivetrains

• Perfect choice for trail, XC, and aggressive MTB riding

In the Box

• 1 x Shimano Deore XT Crank Direct Mount 1x12 FC-M8100-1 crankset (without chainring, without bottom bracket)