Juego de bielas Shimano Black FC-MT900-1

The Shimano Black FC-MT900-1 Crankset sits at the top of Shimano's XTR mountain drivetrain family — the go-to choice for riders who demand the highest level of precision and durability from their components. Built around a single-ring setup, it pairs cleanly with 12-speed XTR groupsets and is designed for the demands of trail, enduro, and cross-country riding. If you're running a performance-oriented build and want a crankset that keeps up, this is where Shimano's engineering effort is concentrated.

Shimano constructs the FC-MT900-1 arms from hollow-forged aluminum, a process that removes material from the inside of the crank arm to reduce weight without compromising stiffness. Direct Mount chainring compatibility simplifies ring swaps and ensures tight chainline tolerances — critical when you're pushing hard through technical terrain or grinding out long climbs. The crankset is available in 170mm and 175mm arm lengths, with 32t and 34t chainring options, so you can spec it to match your riding style and geometry without compromise.

Shimano Black FC-MT900-1 Crankset Specs at a Glance

• Series: Shimano XTR
• Chainring compatibility: 12-speed
• Ring configuration: Single chainring (1x)
• Chainring options: 32t, 34t
• Crank arm lengths: 170mm, 175mm
• Material: Hollow-forged aluminum
• Chainring interface: Direct Mount
• Finish: Black

Design Benefits

1. Hollow-forged construction for a stiffer, lighter arm: By hollowing the crank arm during the forging process, Shimano reduces mass where it isn't needed while maintaining the structural rigidity that translates directly into efficient power transfer — particularly noticeable on steep, technical climbs or hard sprint efforts.
2. Direct Mount chainring interface: The Direct Mount system positions the ring closer to the crank arm, improving chainline precision and making it straightforward to swap rings when you want to adjust your gearing for different terrain or race formats.
3. Multiple sizing options for a dialed fit: The choice between 170mm and 175mm arm lengths, combined with 32t and 34t ring options, means you can match the crankset to your inseam, riding position, and preferred cadence — rather than settling for a one-size compromise.