Shimano Altus FC-M311 Crankset - 170mm | 7/8-Speed | 48/38/28t | Square Taper

Shimano Altus FC-M311 Crankset - 170mm | 7/8-Speed | 48/38/28t Shimano

Shimano Altus FC-M311 Crankset - 170mm | 7/8-Speed | 48/38/28t | Square Taper

Shimano Altus FC-M311 Crankset - 170mm | 7/8-Speed | 48/38/28t | Square Taper

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What Makes the Shimano Altus FC-M311 a Reliable Triple Crankset?

The Shimano Altus FC-M311 is a 3x7/8-speed MTB crankset built for mountain bikes and commuters that need reliable, wide-range gearing without a high price tag. Aluminum crank arms keep weight reasonable while the riveted steel SG-X chainrings deliver the wear resistance and front shift quality that daily riding demands -- steel rings last significantly longer than aluminum under the repeated friction of chain contact, especially on frequently-used triple setups. Hyperdrive chainring profiling with shift ramps and pins delivers smooth, predictable front shifting through the 48/38/28t range whether you're tackling a trail climb or grinding a commute.

Square taper JIS bottom bracket interface -- a compatible BB is required and sold separately (check your frame for 68mm or 73mm shell width). Riveted chainrings are not replaceable individually. Compatible with 7- and 8-speed Shimano MTB drivetrains and 135/142mm rear hubs. MPN: EFCM311C888XL.

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Specifications

  • MPN: EFCM311C888XL
  • Arm Length: 170mm
  • Chainrings: 48/38/28t (steel SG-X, riveted)
  • Speed: 7/8-speed
  • Interface: Square Taper JIS
  • Chainline: 50mm
  • Q-Factor: 187.9mm
  • Arm Material: Aluminum
  • Chainring Material: Steel (riveted, not individually replaceable)
  • Hub Compatibility: 135/142mm MTB
  • BB: Not included (square taper JIS required, 68/73mm)

FAQ

Does a bottom bracket come included?

No. The FC-M311 requires a separate square taper JIS bottom bracket. Check your frame's BB shell width (typically 68mm or 73mm MTB) and spindle length before ordering.

Can I replace the individual chainrings on the FC-M311?

No. The chainrings on the FC-M311 are riveted in place and are not individually replaceable. When the rings are worn, the full crankset needs to be replaced.

What drivetrains is the FC-M311 compatible with?

The FC-M311 is compatible with 7- and 8-speed Shimano MTB drivetrains using a matching 3x front derailleur and 7- or 8-speed rear shifter and cassette.

Best For

Entry-level trail MTB riders and commuters running 7 or 8-speed drivetrains who need a reliable 3x crankset with wide-range steel chainrings and square taper JIS interface.

Shimano Altus FC-M311 Crankset - 170mm | 7/8-Speed | 48/38/28t | Square Taper Reviews:

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