Skip to content

more details:

Shimano logo

Specifications

  • Model: FD-M5100-M
  • Series: Shimano Deore
  • Speed: 2x11 mountain
  • Mount: Mid clamp band, 34.9mm with 28.6mm and 31.8mm adapters
  • Cable Pull: Front-pull
  • Design: Side Swing
  • Top Gear Capacity: 38T maximum
  • Chainstay Angle: 64 to 69 degrees
  • Chain Line: 48.8 / 51.8mm
  • UPC: 192790621203

FAQ

What is Side Swing and why does it matter?

Side Swing is Shimano's front derailleur architecture that pivots from the side of the seat tube rather than the top or bottom. The result is lighter shift action at the lever, cleaner cable routing on modern frames, and more clearance for short chainstays and wide tires.

Will this fit my frame?

The mid-clamp 34.9mm band ships with both 28.6mm and 31.8mm shims, so it fits the three most common modern MTB seat tube diameters. Verify your frame uses a clamp-on mount (not direct mount or E-type) and that the chainstay angle falls between 64 and 69 degrees.

Which shifters work with this derailleur?

Shimano 11-speed mountain shifters using standard front cable pull. Best paired with the Deore SL-M5100 shifter or other M5100-group components for fully matched shift feel.

Best For

Trail and XC riders building or repairing a Shimano Deore 11-speed 2x drivetrain who want reliable Side Swing shifting and broad frame compatibility from a single part number.

Shimano Deore FD-M5100 Front Derailleur - 2x11-Speed | Mid Clamp Reviews:

You may also like