Shimano GRX RD-RX810 (2x11) Rear Derailleur
What the checker says55will not fit
Run variant by variant through the road 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 1031 verified road bike parts in this catalog. 946 produced no finding of any kind.
Will not fit
- Will not fiterror · CassetteSpeed mismatch: Rear derailleur 11s, Cassette 12s. The drivetrain must share one speed count. On 23 of the 34 verified cassettes in this catalog.
- Will not fiterror · Shifter/Brake LeversSpeed mismatch: Shifter 12s, Rear derailleur 11s. The drivetrain must share one speed count. On 11 of the 25 verified shifter/brake levers in this catalog.
- Will not fiterror · CassetteDrivetrain mismatch: Rear derailleur = shimano-grx-11, Cassette = sram-axs-road. Shifter, derailleurs and cassette must be one system. On 10 of the 34 verified cassettes in this catalog.
- Will not fiterror · CassetteDrivetrain mismatch: Rear derailleur = shimano-grx-11, Cassette = shimano-road-12. Shifter, derailleurs and cassette must be one system. On 7 of the 34 verified cassettes in this catalog.
- Will not fiterror · Front DerailleurDrivetrain mismatch: Front derailleur = shimano-road-12, Rear derailleur = shimano-grx-11. Shifter, derailleurs and cassette must be one system. On 6 of the 22 verified front derailleurs in this catalog.
- Will not fiterror · Shifter/Brake LeversDrivetrain mismatch: Shifter = shimano-road-11, Rear derailleur = shimano-grx-11. Shifter, derailleurs and cassette must be one system. On 6 of the 25 verified shifter/brake levers in this catalog.
Rg actuation, Shifter/Brake Levers. 9 more findings from the same check, on up to 1 of the 25 verified shifter/brake levers each.
Rg chain std, Chain. 8 more findings from the same check, on up to 1 of the 25 verified chains each.
Rg drivetrain system, Cassette. 7 more findings from the same check, on up to 5 of the 34 verified cassettes each.
Rg drivetrain system, Shifter/Brake Levers. 7 more findings from the same check, on up to 4 of the 25 verified shifter/brake levers each.
Rg drivetrain system, Front Derailleur. 6 more findings from the same check, on up to 5 of the 22 verified front derailleurs each.
Rg rd capacity, Cassette. 5 more findings from the same check, on up to 5 of the 34 verified cassettes each.
Rg drivetrain speeds, Cassette. 4 more findings from the same check, on up to 3 of the 34 verified cassettes each.
Rg drivetrain speeds, Shifter/Brake Levers. 3 more findings from the same check, on up to 1 of the 25 verified shifter/brake levers each.
Open a variant in the builder to see the ones that apply to your own parts.
$100.00 MSRP·255 g
What the maker states
- System
- Drivetrain system shimano-grx-11
- Speeds
- 11-speed (rear index count the maker rates it for)
- Actuation
- Mechanical
- Maximum cog
- Largest cog 34 teeth
- Mount
- Std-hanger
- Cage
- medium cage
Source
Source: the maker’s page. Last checked 2026-07-20.
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.
- 3T Aeroflux Integrale (Handlebar) No conflicts found
- 3T Apto Stealth Stem (Stem) No conflicts found
- 3T Superergo LTD (standard, non-INTEGRALE) (Handlebar) No conflicts found
- All-City Zig Zag Frameset (Frame) No conflicts found
- Argon 18 SUM D-Shape Seatpost (Seatpost) No conflicts found
- Argon 18 Sum Frameset (Frame) No conflicts found
6 of 696 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.