Shimano Altus FD-M371-3 Front Derailleur
What the checker says57will not fit
Run variant by variant through the mountain bike builder’s own engine. Every sentence below is the checker’s, unedited. Nothing here says this part fits your bike; it says what it does and does not fit among the parts we hold.
Checked against 6140 verified mountain bike parts in this catalog. 5913 produced no finding of any kind. Each variant produces 54 distinct errors and 0 distinct warnings.
Will not fit
- Will not fiterror · Rear DerailleurDrivetrain mismatch: Derailleur = Shimano LinkGlide (CUES), Front derailleur = shimano-9. Shifter, derailleur, cassette, chain and front derailleur must be one system. On 21 of the 75 verified rear derailleurs in this catalog. Applies to all 2 variants.
- Will not fiterror · Rear DerailleurDrivetrain mismatch: Derailleur = Shimano 12-speed, Front derailleur = shimano-9. Shifter, derailleur, cassette, chain and front derailleur must be one system. On 19 of the 75 verified rear derailleurs in this catalog. Applies to all 2 variants.
- Will not fiterror · ShifterDrivetrain mismatch: Shifter = Shimano 12-speed, Front derailleur = shimano-9. Shifter, derailleur, cassette, chain and front derailleur must be one system. On 19 of the 53 verified shifters in this catalog. Applies to all 2 variants.
- Will not fiterror · CassetteDrivetrain mismatch: Cassette = Shimano LinkGlide (CUES), Front derailleur = shimano-9. Shifter, derailleur, cassette, chain and front derailleur must be one system. On 16 of the 60 verified cassettes in this catalog. Applies to all 2 variants.
- Will not fiterror · CassetteDrivetrain mismatch: Cassette = Shimano 12-speed, Front derailleur = shimano-9. Shifter, derailleur, cassette, chain and front derailleur must be one system. On 15 of the 60 verified cassettes in this catalog. Applies to all 2 variants.
- Will not fiterror · Rear DerailleurDrivetrain mismatch: Derailleur = SRAM Eagle 12-speed, Front derailleur = shimano-9. Shifter, derailleur, cassette, chain and front derailleur must be one system. On 12 of the 75 verified rear derailleurs in this catalog. Applies to all 2 variants.
- Will not fiterror · ShifterDrivetrain mismatch: Shifter = Shimano LinkGlide (CUES), Front derailleur = shimano-9. Shifter, derailleur, cassette, chain and front derailleur must be one system. On 11 of the 53 verified shifters in this catalog. Applies to all 2 variants.
Drivetrain system, Chain. 15 more findings from the same check, on up to 9 of the 45 verified chains each.
Drivetrain system, Rear Derailleur. 10 more findings from the same check, on up to 7 of the 75 verified rear derailleurs each.
Drivetrain system, Shifter. 10 more findings from the same check, on up to 6 of the 53 verified shifters each.
Drivetrain system, Cassette. 9 more findings from the same check, on up to 9 of the 60 verified cassettes each.
Actuation, Shifter. 6 more findings from the same check, on up to 1 of the 53 verified shifters each.
Open a variant in the builder to see the ones that apply to your own parts.
$17.00 MSRP·135 g
What the maker states
- System
- Drivetrain system shimano-9
- Speeds
- 3-speed (rear index count the maker rates it for)
- Actuation
- Mechanical (cable)
- Mount
- Band-clamp
- Front rings
- For 3 front chainrings
- Clamp diameter
- 34.9 mm
2 verified variants
| Variant | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|
| Altus FD-M371-3 | $17.00 | 135 g | maker’s page | 2026-08-19 | Build with this |
| Altus FD-M371-6 | $17.00 | 135 g | maker’s page | 2026-08-19 | Build with this |
The rest of what the maker states2 stated·2 not published
- Chainline 50 mm.
- Capacity 22 teeth.
2 further fields the checker looks for are not published by Shimano, so we leave them blank rather than estimate them, and those 2 checks stay silent on this front derailleur. They are speeds rated and direct mount. Each is recorded as “not stated by the maker (not checked)”.
Source: each variant links the maker’s own page in the table above. Last checked 2026-08-19.
Checked against
The checker ran this model against every verified part below that it has a slot for, the same way it checks a build in the builder. What follows is the verdict it actually produced for that specific pairing — not a recommendation, and not a guarantee any of these parts fits your own bike.
- 5DEV R-SPEC Trail/Enduro Cranks (Crankset) No conflicts found
- 9point8 Fall Line (Dropper Post) No conflicts found
- 9point8 Stout (31.8, 30mm) (Stem) No conflicts found
- ACID SLX 30 front (Front Wheel) No conflicts found
- ACID SLX 30 rear (Rear Wheel) No conflicts found
- Acros ZS44/ZS56 (Headset) No conflicts found
6 of 1896 counterparts with a page of their own that the checker actually probed this model against, in alphabetical order by brand and model — never by price, popularity or the verdict itself.