Specifications

Manufacturer: Shimano
Name: GRX REAR DERAILLEUR 12s (FOR 11-34/36T)
Series: RX820
MPN: RD-RX820
Slot consumption: All
Weight (g): 270
Shifting Type: Cable
Slots: Rear Derailleur
Front Speeds: 1
Groupset: GRX
Drivetrain Brand: Shimano
Description: -
Rear Speeds: 12

Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T)

Name: Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T)
Brand: Shimano
SKU: RD-RX820

Rear Derailleur

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Compatibility

This Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T) is a Shimano Gravel rear derailleur. It requires a 12-speed drivetrain and compatible components. It is designed for cable shifting systems. For best performance, use with other RX820 components, though it is mechanically compatible with the parts listed below.

Compatible Shifters20

GRX BRAKE LEVER - DROPPER POST OPERATION

Recommended

Shimano

GRX BRAKE LEVER - DROPPER POST OPERATION

Uses cable shifting type

Recommended

Shimano

GRX BRAKE LEVER 1X12s RX820 (Left)

Matches required 12-speed standard
Uses cable shifting type

ALFINE HYDRAULIC DISC BRAKE LEVER I-SPEC B CLAMP BAND

Compatible

Shimano

ALFINE HYDRAULIC DISC BRAKE LEVER I-SPEC B CLAMP BAND

Uses cable shifting type

Compatible

SRAM

Apex Shift-Brake Lever

Matches required 12-speed standard
Uses cable shifting type

Compatible

Shimano

ASSIST SWITCH

Uses cable shifting type

Compatible

LTWOO

AX Shift Lever (SL-A1206-R)

Matches required 12-speed standard
Uses cable shifting type

Compatible

LTWOO

AX Shift Lever (SL-A1216-R)

Matches required 12-speed standard
Uses cable shifting type

Compatible

Shimano

BRAKE LEVER I-SPEC EV CLAMP BAND

Uses cable shifting type

Compatible

Shimano

BRAKE LEVER I-SPEC II CLAMP BAND

Compatible

Shimano

CUES HYDRAULIC BRAKE LEVER FOR SINGLE

Uses cable shifting type

CUES HYDRAULIC DISC BRAKE LEVER I-SPEC II CLAMP BAND

Compatible

Shimano

CUES HYDRAULIC DISC BRAKE LEVER I-SPEC II CLAMP BAND

Uses cable shifting type

CUES HYDRAULIC DUAL CONTROL LEVER FOR DOUBLE

Compatible

Shimano

CUES HYDRAULIC DUAL CONTROL LEVER FOR DOUBLE

Uses cable shifting type

Compatible

Shimano

DEORE BRAKE LEVER I-SPEC EV

Uses cable shifting type

DEORE XT 3-FINGER HYDRAULIC DISC BRAKE LEVER

Compatible

Shimano

DEORE XT 3-FINGER HYDRAULIC DISC BRAKE LEVER

Uses cable shifting type

Compatible

Shimano

DEORE XT BRAKE LEVER

Uses cable shifting type

Compatible

Shimano

DEORE XT BRAKE LEVER I-SPEC EV CLAMP BAND

Uses cable shifting type

DEORE XT SHIFT LEVER RIGHT I-SPEC EV 12s

Compatible

Shimano

DEORE XT SHIFT LEVER RIGHT I-SPEC EV 12s

Matches required 12-speed standard
Uses cable shifting type

Compatible

Shimano

DEORE XT SHIFT LEVER RIGHT12s

Matches required 12-speed standard
Uses cable shifting type

Compatible

Shimano

DROPPER SEAT POST LEVER

Uses cable shifting type

Compatible

Shimano

DROPPER SEAT POST LEVER CLAMP BAND MOUNT

Uses cable shifting type

Compatible Cassettes20

Compatible

Shimano

105 HG CASSETTE 12s

Matches required 12-speed standard

Compatible

Shimano

ALFINE SINGLE SPROCKET

Compatible

Shimano

DEORE HYPERGLIDE+ CASSETTE 12s

Matches required 12-speed standard
Uses shimano hg plus standard

Compatible

Shimano

DEORE XT HYPERGLIDE+ CASSETTE 12s M8100

Matches required 12-speed standard
Uses shimano hg plus standard

Compatible

Shimano

DEORE XT HYPERGLIDE+ CASSETTE 12s M8200

Matches required 12-speed standard
Uses shimano hg plus standard

Compatible

Shimano

DURA-ACE HYPERGLIDE+ CASSETTE 12s

Matches required 12-speed standard
Uses shimano hg plus standard

Compatible

SRAM

Force XG-1270 Cassette (CS-XG-1270-D1)

Matches required 12-speed standard
Uses sram flattop standard

Compatible

SRAM

Force XG-1270 Cassette (CS-XG-1270-E1)

Matches required 12-speed standard
Uses sram flattop standard

Compatible

Shimano

HG CASSETTE 12s

Matches required 12-speed standard
Uses shimano hg standard

Compatible

SRAM

PG-1210 Eagle Cassette

Matches required 12-speed standard
Uses sram eagle standard

Compatible

SRAM

PG-1230 Eagle Cassette

Matches required 12-speed standard
Uses sram eagle standard

Compatible

SRAM

RED XG-1290 Cassette

Matches required 12-speed standard
Uses sram flattop standard

Compatible

SRAM

Rival XG-1250 Cassette

Matches required 12-speed standard
Uses sram flattop standard

Compatible

Shimano

SLX HYPERGLIDE+ CASSETTE 12s

Matches required 12-speed standard
Uses shimano hg plus standard

ULTEGRA HYPERGLIDE+ CASSETTE 12s (CS-R8100-12)

Compatible

Shimano

ULTEGRA HYPERGLIDE+ CASSETTE 12s (CS-R8100-12)

Matches required 12-speed standard
Uses shimano hg plus standard

ULTEGRA HYPERGLIDE+ CASSETTE 12s (CS-R8101-12)

Compatible

Shimano

ULTEGRA HYPERGLIDE+ CASSETTE 12s (CS-R8101-12)

Matches required 12-speed standard
Uses shimano hg plus standard

Compatible

SRAM

XG-1275 Eagle Cassette (CS-XG-1275-B1)

Matches required 12-speed standard
Uses sram eagle standard

Compatible

SRAM

XG-1275 Eagle Cassette (CS-XG-1275-C1)

Matches required 12-speed standard
Uses sram eagle standard

Compatible

SRAM

XG-1295 Eagle Cassette (CS-XG-1295-A3)

Matches required 12-speed standard
Uses sram eagle standard

Compatible

SRAM

XG-1295 Eagle Cassette (CS-XG-1295-B1)

Matches required 12-speed standard
Uses sram eagle standard

Compatible Cranksets20

Recommended

Shimano

GRX CRANKSET - 1X12s RX820

Matches required 12-speed standard

Compatible

Shimano

ALFINE CRANKSET WITH CHAIN GUARD

Compatible

SRAM

Apex 1 Wide Crankset

Matches required 12-speed standard

CRANKSET FOR 135/142/148 MM O.L.D. FRAMES 1X12s

Compatible

Shimano

CRANKSET FOR 135/142/148 MM O.L.D. FRAMES 1X12s

Matches required 12-speed standard
Uses shimano hg standard

Compatible

Shimano

CRANKSET FOR 148 MM O.L.D. FRAMES 1X12s

Matches required 12-speed standard
Uses shimano hg standard

DEORE CRANKSET FOR 142/148 MM O.L.D. FRAMES 1X12s 1x

Compatible

Shimano

DEORE CRANKSET FOR 142/148 MM O.L.D. FRAMES 1X12s 1x

Matches required 12-speed standard
Uses shimano hg standard

DEORE CRANKSET FOR 142/148 MM O.L.D. FRAMES 1X12s M6100 1x

Compatible

Shimano

DEORE CRANKSET FOR 142/148 MM O.L.D. FRAMES 1X12s M6100 1x

Matches required 12-speed standard
Uses shimano hg plus standard

DEORE CRANKSET FOR 148 MM O.L.D. FRAMES 1X12s

Compatible

Shimano

DEORE CRANKSET FOR 148 MM O.L.D. FRAMES 1X12s

Matches required 12-speed standard
Uses shimano hg plus standard

DEORE CRANKSET FOR 157 MM O.L.D. FRAMES 1X12s

Compatible

Shimano

DEORE CRANKSET FOR 157 MM O.L.D. FRAMES 1X12s

Matches required 12-speed standard
Uses shimano hg plus standard

DEORE XT CRANKSET 176 MM Q-FACTOR 55 MM CHAIN LINE 12s

Compatible

Shimano

DEORE XT CRANKSET 176 MM Q-FACTOR 55 MM CHAIN LINE 12s

Matches required 12-speed standard

DEORE XT CRANKSET 52 MM CHAIN LINE 1X12s

Compatible

Shimano

DEORE XT CRANKSET 52 MM CHAIN LINE 1X12s

Matches required 12-speed standard
Uses shimano hg plus standard

DEORE XT CRANKSET 56.5 MM CHAIN LINE 1X12s

Compatible

Shimano

DEORE XT CRANKSET 56.5 MM CHAIN LINE 1X12s

Matches required 12-speed standard
Uses shimano hg plus standard

DEORE XT E-BIKE HOLLOWTECH CRANK ARM SET M8000

Compatible

Shimano

DEORE XT E-BIKE HOLLOWTECH CRANK ARM SET M8000

Uses shimano hg standard

DEORE XT E-BIKE HOLLOWTECH CRANK ARM SET M8100

Compatible

Shimano

DEORE XT E-BIKE HOLLOWTECH CRANK ARM SET M8100

Uses shimano hg plus standard

Compatible

Shimano

E-BIKE CRANK ARM SET (FC-E5000)

Uses shimano hg standard

Compatible

Shimano

E-BIKE CRANK ARM SET (FC-EM600)

Uses shimano hg standard

Compatible

Shimano

E-BIKE CRANK ARM SET (FC-EN500)

Uses shimano hg standard

Compatible

SRAM

Eagle 70 Transmission Crankset

Matches required 12-speed standard

Eagle 70 Transmission E-MTB Crank Assembly

Compatible

SRAM

Eagle 70 Transmission E-MTB Crank Assembly

Compatible

SRAM

Eagle 90 Transmission Crankset

Matches required 12-speed standard

Compatible Chains20

Compatible

SRAM

12s PowerLock

Matches required 12-speed standard
Uses sram flattop standard

Compatible

Shimano

ALFINE DOUBLE PULLEY CHAIN TENSIONER

ALFINE SINGLE FIXED PULLEY CHAIN TENSIONER

Compatible

Shimano

ALFINE SINGLE FIXED PULLEY CHAIN TENSIONER

Compatible

SRAM

Apex Chain

Matches required 12-speed standard
Uses sram flattop standard

Compatible

Shimano

CHAIN DEVICE 11/12s

Matches required 12-speed standard
Uses shimano hg standard

Compatible

Shimano

CHAIN DEVICE D-TYPE MOUNT

Uses shimano hg standard

Compatible

Shimano

CHAIN DEVICE E-TYPE MOUNT

Uses shimano hg standard

Compatible

Shimano

CHAIN DEVICE ISCG05 MOUNT

Uses shimano hg standard

Compatible

Shimano

CN-M6100 HYPERGLIDE+ CHAIN 12s

Matches required 12-speed standard
Uses shimano hg plus standard

Compatible

Shimano

CN-M7100 HYPERGLIDE+ CHAIN 12s

Matches required 12-speed standard
Uses shimano hg plus standard

Compatible

Shimano

CN-M8100 HYPERGLIDE+ CHAIN 12s

Matches required 12-speed standard
Uses shimano hg plus standard

Compatible

Shimano

CN-M9100 HYPERGLIDE+ CHAIN 12s

Matches required 12-speed standard
Uses shimano hg plus standard

Compatible

SRAM

Eagle 70 Transmission Flattop Chain

Matches required 12-speed standard
Uses sram eagle standard

Compatible

SRAM

Eagle PowerLock

Matches required 12-speed standard
Uses sram eagle standard

Compatible

SRAM

Eagle S100 Chain

Matches required 12-speed standard
Uses sram eagle standard

Compatible

SRAM

Eagle S200 Chain

Matches required 12-speed standard
Uses sram eagle standard

Compatible

SRAM

Eagle S500 Chain

Matches required 12-speed standard
Uses sram eagle standard

Compatible

SRAM

Eagle Transmission PowerLock

Matches required 12-speed standard
Uses sram eagle standard

Compatible

SRAM

Force Chain (CN-FRC-D1)

Matches required 12-speed standard
Uses sram flattop standard

Compatible

SRAM

Force Chain (CN-FRC-E1)

Matches required 12-speed standard
Uses sram flattop standard

Frequently Asked Questions

What fits with Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T)?

Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T) is compatible with shifters, cassettes, cranksets, chains that match its technical standards. Most importantly, it requires matching 12-speed components.

Can I use a higher or lower speed chain with Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T)?

No, Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T) requires a 12-speed chain. Chains for different speeds have different external widths and internal profiles, which will cause poor shifting or mechanical interference.

Does this Shimano GRX REAR DERAILLEUR 12s (FOR 11-34/36T) work with electronic shifting like Di2 or AXS?

No, this is a mechanical cable-actuated component. Electronic systems use internal motors and proprietary signals that are physically and electrically incompatible with mechanical components.