Box Box Shifter
What the checker says116will 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 6121 verified mountain bike parts in this catalog. 5914 produced no finding of any kind. Each variant produces 74 distinct errors and 0 distinct warnings.
Will not fit
- Will not fiterror · Rear DerailleurSpeed mismatch: Shifter 9s, Derailleur 12s. Shifter, derailleur and cassette must be the same speed count. On 39 of the 75 verified rear derailleurs in this catalog. Applies to all 3 variants.
- Will not fiterror · CassetteSpeed mismatch: Shifter 9s, Cassette 12s. Shifter, derailleur and cassette must be the same speed count. On 31 of the 60 verified cassettes in this catalog. Applies to all 3 variants.
- Will not fiterror · Rear DerailleurDrivetrain mismatch: Shifter = Box Prime 9 (9-speed), Derailleur = Shimano LinkGlide (CUES). 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 3 variants.
- Will not fiterror · Rear DerailleurDrivetrain mismatch: Shifter = Box Prime 9 (9-speed), Derailleur = Shimano 12-speed. 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 3 variants.
- Will not fiterror · CassetteDrivetrain mismatch: Shifter = Box Prime 9 (9-speed), Cassette = Shimano LinkGlide (CUES). Shifter, derailleur, cassette, chain and front derailleur must be one system. On 16 of the 60 verified cassettes in this catalog. Applies to all 3 variants.
- Will not fiterror · Rear DerailleurSpeed mismatch: Shifter 9s, Derailleur 11s. Shifter, derailleur and cassette must be the same speed count. On 16 of the 75 verified rear derailleurs in this catalog. Applies to all 3 variants.
- Will not fiterror · CassetteDrivetrain mismatch: Shifter = Box Prime 9 (9-speed), Cassette = Shimano 12-speed. Shifter, derailleur, cassette, chain and front derailleur must be one system. On 15 of the 60 verified cassettes in this catalog. Applies to all 3 variants.
Actuation, Rear Derailleur. 63 more findings from the same check, on up to 1 of the 75 verified rear derailleurs each.
Drivetrain system, Chain. 15 more findings from the same check, on up to 9 of the 45 verified chains each.
Drivetrain system, Rear Derailleur. 11 more findings from the same check, on up to 12 of the 75 verified rear derailleurs each.
Drivetrain system, Cassette. 9 more findings from the same check, on up to 9 of the 60 verified cassettes each.
Drivetrain speeds, Cassette. 4 more findings from the same check, on up to 11 of the 60 verified cassettes each.
Drivetrain system, Front Derailleur. 4 more findings from the same check, on up to 12 of the 34 verified front derailleurs each.
Drivetrain speeds, Rear Derailleur. 3 more findings from the same check, on up to 10 of the 75 verified rear derailleurs each.
Open a variant in the builder to see the ones that apply to your own parts.
$47.99 to $81.99 MSRP·128 to 130 g
What the maker states
- System
- Drivetrain system Box Prime 9 (9-speed)
- Speeds
- 9-speed (rear index count the maker rates it for)
- Actuation
- Mechanical (cable)
- Clamp type
- Clamp band clamp
3 verified variants
| Variant | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|
| Box Three Prime 9 Multi Shift (2019) | $47.99 | 128 g | maker’s page | 2026-07-14 | Build with this |
| Box One Prime 9 Multi Shift (2019) | $81.99 | 130 g | maker’s page | 2026-07-14 | Build with this |
| Box Two Prime 9 Multi Shift | $62.99 | not stated | maker’s page | 2026-07-31 | Build with this |
Source
Source: each variant links the maker’s own page in the table above. Last checked 2026-07-14 to 2026-07-31.
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 1874 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.