GX 2x10 Rear Derailleur

Specifications

Manufacturer
SRAM
Name
GX 2x10 Rear Derailleur
Series
GX
MPN
RD-GX-T21-A1
Shifting Type
Cable
Chain Standard
Standard
Weight (g)
302
Front Speeds
1
Cage Length
Long
Drivetrain Brand
Sram
Rear Speeds
10
Max Cog (T)
36

SRAM GX 2x10 Rear Derailleur

Rear Derailleur

Loading offers…

Compatibility

This SRAM GX 2x10 Rear Derailleur is a SRAM MTB rear derailleur. It requires a 10-speed drivetrain and compatible components. It is designed for cable shifting systems. For best performance, use with other GX components, though it is mechanically compatible with the parts listed below.

Compatible Shifters20

A7 Shift Lever (SL-A1006-R)Compatible

LTWOO

A7 Shift Lever (SL-A1006-R)

  • Matches required 10-speed standard
  • Uses cable shifting type
ALFINE HYDRAULIC DISC BRAKE LEVER I-SPEC B CLAMP BANDCompatible

Shimano

ALFINE HYDRAULIC DISC BRAKE LEVER I-SPEC B CLAMP BAND

  • Uses cable shifting type
ASSIST SWITCHCompatible

Shimano

ASSIST SWITCH

  • Uses cable shifting type
BRAKE LEVER I-SPEC EV CLAMP BANDCompatible

Shimano

BRAKE LEVER I-SPEC EV CLAMP BAND

  • Uses cable shifting type
BRAKE LEVER I-SPEC II CLAMP BANDCompatible

Shimano

BRAKE LEVER I-SPEC II CLAMP BAND

CUES BRAKE LEVER FOR SINGLECompatible

Shimano

CUES BRAKE LEVER FOR SINGLE

  • Matches required 10/11-speed standard
  • Uses cable shifting type
CUES HYDRAULIC BRAKE LEVER FOR SINGLECompatible

Shimano

CUES HYDRAULIC BRAKE LEVER FOR SINGLE

  • Uses cable shifting type
CUES HYDRAULIC DISC BRAKE LEVER I-SPEC II CLAMP BANDCompatible

Shimano

CUES HYDRAULIC DISC BRAKE LEVER I-SPEC II CLAMP BAND

  • Uses cable shifting type
CUES HYDRAULIC DUAL CONTROL LEVER 11/10sCompatible

Shimano

CUES HYDRAULIC DUAL CONTROL LEVER 11/10s

  • Matches required 10/11-speed standard
  • Uses cable shifting type
CUES HYDRAULIC DUAL CONTROL LEVER FOR DOUBLECompatible

Shimano

CUES HYDRAULIC DUAL CONTROL LEVER FOR DOUBLE

  • Uses cable shifting type
CUES MECHANICAL DUAL CONTROL LEVER 10sCompatible

Shimano

CUES MECHANICAL DUAL CONTROL LEVER 10s

  • Matches required 10-speed standard
  • Uses cable shifting type
CUES SHIFT LEVER SHORT REACH 10sCompatible

Shimano

CUES SHIFT LEVER SHORT REACH 10s

  • Matches required 10-speed standard
  • Uses cable shifting type
CUES SHIFTER CLAMP BAND 10sCompatible

Shimano

CUES SHIFTER CLAMP BAND 10s

  • Matches required 10-speed standard
  • Uses cable shifting type
DEORE BRAKE LEVER I-SPEC EVCompatible

Shimano

DEORE BRAKE LEVER I-SPEC EV

  • Uses cable shifting type
DEORE LINKGLIDE SHIFT LEVER RIGHT CLAMP BAND 10sCompatible

Shimano

DEORE LINKGLIDE SHIFT LEVER RIGHT CLAMP BAND 10s

  • Matches required 10-speed standard
  • Uses cable shifting type
DEORE SHIFT LEVER 10sCompatible

Shimano

DEORE SHIFT LEVER 10s

  • Matches required 10-speed standard
  • Uses cable shifting type
DEORE SHIFT LEVER RIGHT CLAMP BAND10sCompatible

Shimano

DEORE SHIFT LEVER RIGHT CLAMP BAND10s

  • Matches required 10-speed standard
  • Uses cable shifting type
DEORE SHIFT LEVER RIGHT I-SPEC II 10sCompatible

Shimano

DEORE SHIFT LEVER RIGHT I-SPEC II 10s

  • Matches required 10-speed standard
  • Uses cable shifting type
DEORE XT 3-FINGER HYDRAULIC DISC BRAKE LEVERCompatible

Shimano

DEORE XT 3-FINGER HYDRAULIC DISC BRAKE LEVER

  • Uses cable shifting type
DEORE XT BRAKE LEVERCompatible

Shimano

DEORE XT BRAKE LEVER

  • Uses cable shifting type

Compatible Cranksets16

ALFINE CRANKSET WITH CHAIN GUARDCompatible

Shimano

ALFINE CRANKSET WITH CHAIN GUARD

Apex 1 CranksetCompatible

SRAM

Apex 1 Crankset

  • Matches required 10-speed standard
Eagle 70 Transmission E-MTB Crank AssemblyCompatible

SRAM

Eagle 70 Transmission E-MTB Crank Assembly

Eagle 90 Transmission E-MTB Crank AssemblyCompatible

SRAM

Eagle 90 Transmission E-MTB Crank Assembly

Eagle S100 Crank AssemblyCompatible

SRAM

Eagle S100 Crank Assembly

Force 1 Crankset (FC-FRC-1-A1)Compatible

SRAM

Force 1 Crankset (FC-FRC-1-A1)

  • Matches required 10-speed standard
GX Eagle E-MTB Crank AssemblyCompatible

SRAM

GX Eagle E-MTB Crank Assembly

NEXUS CRANKSETCompatible

Shimano

NEXUS CRANKSET

RED Crankarm AssemblyCompatible

SRAM

RED Crankarm Assembly

Rival 1 CranksetCompatible

SRAM

Rival 1 Crankset

  • Matches required 10-speed standard
Road Carbon Fiber Crankset (BCD)Compatible

WheelTop

Road Carbon Fiber Crankset (BCD)

Road Carbon Fiber Crankset (Direct Mount)Compatible

WheelTop

Road Carbon Fiber Crankset (Direct Mount)

S-300 CranksetCompatible

SRAM

S-300 Crankset

X0 Eagle E-MTB Crank AssemblyCompatible

SRAM

X0 Eagle E-MTB Crank Assembly

X01 DH X-SYNC CranksetCompatible

SRAM

X01 DH X-SYNC Crankset

  • Matches required 10-speed standard
XX Eagle E-MTB Crank AssemblyCompatible

SRAM

XX Eagle E-MTB Crank Assembly

Frequently Asked Questions

What fits with SRAM GX 2x10 Rear Derailleur?

SRAM GX 2x10 Rear Derailleur is compatible with cassettes, chains, shifters, cranksets that match its technical standards. Most importantly, it requires matching 10-speed components.

Can I use a higher or lower speed chain with SRAM GX 2x10 Rear Derailleur?

No, SRAM GX 2x10 Rear Derailleur requires a 10-speed chain. Chains for different speeds have different external widths and internal profiles, which will cause poor shifting or mechanical interference.

Does this SRAM GX 2x10 Rear Derailleur 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.

Can I mix SRAM GX 2x10 Rear Derailleur with Road components?

While some mechanical standards (like cassette spacing at certain speeds) may overlap, SRAM GX 2x10 Rear Derailleur is optimized for MTB use. Mixing with Road parts often fails due to differing pull ratios and chainlines.