Shimano CUES RD-U4000 GS Rear Derailleur
What the checker says51will not fit
Run variant by variant through the e-MTB 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 442 verified e-MTB parts in this catalog. 338 produced no finding of any kind; that is CUES RD-U4000 GS 9-speed. CUES RD-U4020 clears 334. Each variant produces 39 to 44 distinct errors and 0 distinct warnings.
Will not fit
- Will not fiterror · CassetteSpeed mismatch: Derailleur 9s, Cassette 12s. Shifter, derailleur and cassette must be the same speed count. On 30 of the 58 verified cassettes in this catalog. Applies to all 2 variants.
- Will not fiterror · ShifterSpeed mismatch: Shifter 12s, Derailleur 9s. Shifter, derailleur and cassette must be the same speed count. On 28 of the 53 verified shifters in this catalog. Applies to all 2 variants.
- Will not fiterror · ShifterDrivetrain mismatch: Shifter = shimano-12, Derailleur = shimano-linkglide. Shifter, derailleur and cassette must be one system. On 19 of the 53 verified shifters in this catalog. Applies to all 2 variants.
- Will not fiterror · CassetteDrivetrain mismatch: Derailleur = shimano-linkglide, Cassette = shimano-12. Shifter, derailleur and cassette must be one system. On 14 of the 58 verified cassettes in this catalog. Applies to all 2 variants.
- Will not fiterror · CassetteCassette too big: 52T cassette exceeds the Shimano CUES RD-U4000 GS 9-speed max of 46T. On 13 of the 58 verified cassettes in this catalog. Applies to 1 of 2 variants.
- Will not fiterror · CassetteCassette too big: 52T cassette exceeds the Shimano CUES RD-U4020 max of 36T. On 13 of the 58 verified cassettes in this catalog. Applies to 1 of 2 variants.
Emtb cassette capacity, Cassette. 11 more findings from the same check, on up to 11 of the 58 verified cassettes each.
Emtb drivetrain system, Shifter. 11 more findings from the same check, on up to 6 of the 53 verified shifters each.
Emtb drivetrain system, Cassette. 9 more findings from the same check, on up to 9 of the 58 verified cassettes each.
Emtb actuation, Shifter. 6 more findings from the same check, on up to 1 of the 53 verified shifters each.
Emtb drivetrain speeds, Cassette. 4 more findings from the same check, on up to 11 of the 58 verified cassettes each.
Emtb drivetrain speeds, Shifter. 4 more findings from the same check, on up to 10 of the 53 verified shifters each.
Open a variant in the builder to see the ones that apply to your own parts.
$28.00 to $60.00 MSRP·300 to 330 g
What the maker states
- System
- Drivetrain system Shimano LinkGlide (CUES)
- Speeds
- 9-speed (rear index count the maker rates it for)
- Actuation
- Mechanical (cable)
- Mount
- Standard hanger
- Maximum cog
- Largest cog 36 teeth (on 1 of 2 variants); Largest cog 46 teeth (on 1 of 2 variants)
A value shown as a set or a range differs between this model’s variants and is never one variant’s spec.
2 verified variants
| Variant | Maximum cog | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|---|
| CUES RD-U4000 GS 9-speed | Largest cog 46 teeth | $60.00 | 330 g | maker’s page | 2026-07-13 | Build with this |
| CUES RD-U4020 | Largest cog 36 teeth | $28.00 | 300 g | maker’s page | 2026-08-19 | Build with this |
The rest of what the maker states2 not published
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 rear derailleur. They are maximum cog top and total capacity. 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 2026-07-13 to 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.
- 9point8 Fall Line 30.9 / 125mm (INLINE) (Dropper Post) No conflicts found
- BikeYoke Divine 2.0 Dropper Post 31.6 / 125mm (Dropper Post) No conflicts found
- BikeYoke Divine SL Dropper Post 30.9 / 80mm (Dropper Post) No conflicts found
- BikeYoke Divine SL Rascal Dropper Post 30.9 / 80mm (Dropper Post) No conflicts found
- BikeYoke Revive 3.0 Dropper Post 30.9 / 125mm (Dropper Post) No conflicts found
- BikeYoke Revive Max 3.0 (34.9) Silver Ltd. Dropper Post 34.9 / 125mm (Dropper Post) No conflicts found
6 of 227 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.