Biela Shimano SLX FC-M7100-1

The Shimano SLX FC-M7100-1 Crank sits in Shimano's SLX tier — the sweet spot of the MTB lineup where trail-worthy performance meets durability that holds up across seasons of hard riding. Designed as a dedicated 1x drivetrain crank, it pairs directly with Shimano's 12-speed SLX and XT groupsets, making it a natural choice for riders building or upgrading a capable trail or enduro setup. Three arm lengths — 165mm, 170mm, and 175mm — let you dial in the fit that suits your riding style and bike geometry.

The FC-M7100-1 shares its design language with Shimano's higher-tier Deore XT family, with a hollow crank arm construction intended to reduce weight without compromising rigidity under load. The single-ring configuration keeps the front end simple and reliable — no front derailleur, no chain guides required when paired with a narrow-wide chainring. Shimano engineers the SLX line to trickle down proven technology from the XTR platform, so you're getting a crank shaped by racing and aggressive trail use, not just entry-level trail riding.

Shimano SLX FC-M7100-1 Crank Specs at a Glance

• Series: Shimano SLX (M7100)
• Configuration: 1x (single chainring)
• Compatibility: 12-speed Shimano MTB drivetrain
• Arm lengths available: 165mm, 170mm, 175mm
• Finish: Black
• Bottom bracket: Requires separate purchase (Shimano MTB BB recommended)
• Chainline: 52mm

Design Benefits

1. 1x-specific geometry — Built from the ground up for single-ring drivetrains, the FC-M7100-1 is engineered to maintain consistent chainline and chain retention across the full cassette range, which matters most when you're pushing hard through technical terrain or hammering out of a corner.
2. Arm length options for real fit — With 165mm, 170mm, and 175mm available, you can match the crank to your inseam, riding position, and ground clearance needs rather than defaulting to whatever fits in the box. Short cranks suit riders prioritizing pedal clearance on rocky trails; longer arms suit those chasing maximum leverage on long climbs.
3. SLX-tier durability — Shimano designs the SLX line to handle the same conditions as its top-end groups, with construction tolerances and materials that hold up across wet winter rides, dusty summer singletrack, and everything in between — without demanding constant servicing.