Shimano GRX REAR DERAILLEUR 11s (FOR 11-40/42T)

Rear Derailleur

GRX REAR DERAILLEUR 11s (FOR 11-40/42T)

Specifications

Manufacturer
Shimano
Name
GRX REAR DERAILLEUR 11s (FOR 11-40/42T)
Series
RX810
MPN
RD-RX812
Groupset
GRX
Rear Speeds
11
Drivetrain Brand
Shimano
Shifting Type
Cable
Max Cog (T)
42[1]
Compatible Chain Standards
Shimano LinkGlide, Shimano HG (Hyperglide)
Weight (g)
267
Sources
  1. [1] bike.shimano.com, checked 29 Sep 2026: Max Cog (T)

Compatibility

Shimano GRX REAR DERAILLEUR 11s (FOR 11-40/42T) is a Shimano rear derailleur. It is an 11-speed component. It uses Cable shifting. Everything listed below was matched on a specification we hold for both parts: the interface each pairing actually depends on, such as freehub body, speed count, actuation or mounting standard. Where we could not verify that interface, the part is left out rather than assumed to fit.

Shifters that drive this derailleur12

GRX DUAL CONTROL LEVER 11s RX810Recommended

Shimano

GRX DUAL CONTROL LEVER 11s RX810

  • Both are 11-speed
  • Both use cable actuation
105 DUAL CONTROL LEVER RIM BRAKE 11sMechanically compatible

Shimano

105 DUAL CONTROL LEVER RIM BRAKE 11s

  • Both are 11-speed
  • Both use cable actuation
105 HYDRAULIC DISC BRAKE DUAL CONTROL LEVER 11sMechanically compatible

Shimano

105 HYDRAULIC DISC BRAKE DUAL CONTROL LEVER 11s

  • Both are 11-speed
  • Both use cable actuation
105 HYDRAULIC DISC BRAKE DUAL CONTROL LEVER FOR SMALL HANDS 11sMechanically compatible

Shimano

105 HYDRAULIC DISC BRAKE DUAL CONTROL LEVER FOR SMALL HANDS 11s

  • Both are 11-speed
  • Both use cable actuation
DURA-ACE DUAL CONTROL LEVER 11sMechanically compatible

Shimano

DURA-ACE DUAL CONTROL LEVER 11s

  • Both are 11-speed
  • Both use cable actuation
DURA-ACE HYDRAULIC DISC BRAKE DUAL CONTROL LEVER 11sMechanically compatible

Shimano

DURA-ACE HYDRAULIC DISC BRAKE DUAL CONTROL LEVER 11s

  • Both are 11-speed
  • Both use cable actuation
GRX DUAL CONTROL LEVER 11s RX600Mechanically compatible

Shimano

GRX DUAL CONTROL LEVER 11s RX600

  • Both are 11-speed
  • Both use cable actuation
GRX-LIMITED DUAL CONTROL LEVER 11sMechanically compatible

Shimano

GRX-LIMITED DUAL CONTROL LEVER 11s

  • Both are 11-speed
  • Both use cable actuation
GRX-LIMITED SHIFT LEVER FLAT BAR 11sMechanically compatible

Shimano

GRX-LIMITED SHIFT LEVER FLAT BAR 11s

  • Both are 11-speed
  • Both use cable actuation
ULTEGRA DUAL CONTROL LEVER RIM BRAKE 11sMechanically compatible

Shimano

ULTEGRA DUAL CONTROL LEVER RIM BRAKE 11s

  • Both are 11-speed
  • Both use cable actuation
ULTEGRA HYDRAULIC DISC BRAKE DUAL CONTROL LEVER 11sMechanically compatible

Shimano

ULTEGRA HYDRAULIC DISC BRAKE DUAL CONTROL LEVER 11s

  • Both are 11-speed
  • Both use cable actuation
ULTEGRA HYDRAULIC DISC BRAKE DUAL CONTROL LEVER FOR SMALL HANDS 11sMechanically compatible

Shimano

ULTEGRA HYDRAULIC DISC BRAKE DUAL CONTROL LEVER FOR SMALL HANDS 11s

  • Both are 11-speed
  • Both use cable actuation

Chains for this derailleur20

CN-HG601-11 LINKGLIDE, HG CHAIN 11sShares a standard

Shimano

CN-HG601-11 LINKGLIDE, HG CHAIN 11s

  • Both are 11-speed
CN-HG701-11 LINKGLIDE, HG CHAIN 11sShares a standard

Shimano

CN-HG701-11 LINKGLIDE, HG CHAIN 11s

  • Both are 11-speed
CN-LG500 LINKGLIDE CHAIN 10/11s Shares a standard

Shimano

CN-LG500 LINKGLIDE CHAIN 10/11s

  • Both are 11-speed
DLC 11Shares a standard

KMC

DLC 11

  • Both are 11-speed
e11Shares a standard

KMC

e11

  • Both are 11-speed
eGlideShares a standard

KMC

eGlide

  • Both are 11-speed
K-FORCE LIGHT 11 SPEED CHAINShares a standard

FSA

K-FORCE LIGHT 11 SPEED CHAIN

  • Both are 11-speed
K-FORCE LIGHT MTB 11 SPEED CHAINShares a standard

FSA

K-FORCE LIGHT MTB 11 SPEED CHAIN

  • Both are 11-speed
K-Force WE 11 SPEED CHAINShares a standard

FSA

K-Force WE 11 SPEED CHAIN

  • Both are 11-speed
PC-1110 ChainShares a standard

SRAM

PC-1110 Chain

  • Both are 11-speed
PC-1130 ChainShares a standard

SRAM

PC-1130 Chain

  • Both are 11-speed
PC-1170 ChainShares a standard

SRAM

PC-1170 Chain

  • Both are 11-speed
PC-X1 ChainShares a standard

SRAM

PC-X1 Chain

  • Both are 11-speed
RED 22 ChainShares a standard

SRAM

RED 22 Chain

  • Both are 11-speed
SF11 E-BIKE 11 SPEED CHAINShares a standard

FSA

SF11 E-BIKE 11 SPEED CHAIN

  • Both are 11-speed
Team Issue ChainShares a standard

FSA

Team Issue Chain

  • Both are 11-speed
WAX DLC 11Shares a standard

KMC

WAX DLC 11

  • Both are 11-speed
WAX TT 11Shares a standard

KMC

WAX TT 11

  • Both are 11-speed
WAX X11Shares a standard

KMC

WAX X11

  • Both are 11-speed
WAX X11ELShares a standard

KMC

WAX X11EL

  • Both are 11-speed

Cassettes for this derailleur9

105 HG CASSETTE 11sShares a standard

Shimano

105 HG CASSETTE 11s

  • Both are 11-speed
  • Both are Shimano drivetrain parts
11-34T HG CASSETTE 11sShares a standard

Shimano

11-34T HG CASSETTE 11s

  • Both are 11-speed
  • Both are Shimano drivetrain parts
DEORE XT HG CASSETTE 11s Shares a standard

Shimano

DEORE XT HG CASSETTE 11s

  • Both are 11-speed
  • Both are Shimano drivetrain parts
DURA-ACE HG CASSETTE 11sShares a standard

Shimano

DURA-ACE HG CASSETTE 11s

  • Both are 11-speed
  • Both are Shimano drivetrain parts
HG CASSETTE 11sShares a standard

Shimano

HG CASSETTE 11s

  • Both are 11-speed
  • Both are Shimano drivetrain parts
HG CASSETTE 11s Shares a standard

Shimano

HG CASSETTE 11s

  • Both are 11-speed
  • Both are Shimano drivetrain parts
LINKGLIDE CASSETTE 11s (CS-LG400-11)Shares a standard

Shimano

LINKGLIDE CASSETTE 11s (CS-LG400-11)

  • Both are 11-speed
  • Both are Shimano drivetrain parts
LINKGLIDE CASSETTE 11s (CS-LG700-11)Shares a standard

Shimano

LINKGLIDE CASSETTE 11s (CS-LG700-11)

  • Both are 11-speed
  • Both are Shimano drivetrain parts
ULTEGRA HG CASSETTE 11sShares a standard

Shimano

ULTEGRA HG CASSETTE 11s

  • Both are 11-speed
  • Both are Shimano drivetrain parts

Frequently Asked Questions

What fits Shimano GRX REAR DERAILLEUR 11s (FOR 11-40/42T)?

On this page we list shifters that drive this derailleur, chains for this derailleur, cassettes for this derailleur. Each listing was matched on a specification we hold for both parts; anything we could not verify is omitted rather than assumed to fit.

Can I use a higher or lower speed chain with Shimano GRX REAR DERAILLEUR 11s (FOR 11-40/42T)?

No. Shimano GRX REAR DERAILLEUR 11s (FOR 11-40/42T) is an 11-speed component and needs an 11-speed chain. Chains for different speed counts have different external widths and inner-plate profiles, which causes poor shifting or interference with the neighbouring sprockets.

Does Shimano GRX REAR DERAILLEUR 11s (FOR 11-40/42T) work with electronic shifting like Di2 or AXS?

No. Shimano GRX REAR DERAILLEUR 11s (FOR 11-40/42T) is mechanical, cable-actuated. Electronic groups use internal motors and proprietary signalling, so there is no mechanical or electrical path between the two.