LTWOO RX Rear Derailleur (RD-R1212-M-A)

Rear Derailleur

RX Rear Derailleur (RD-R1212-M-A)
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Specifications

Manufacturer
LTWOO
Name
RX Rear Derailleur (RD-R1212-M-A)
Series
RX
MPN
RD-R1212-M-A
Rear Speeds
12
Drivetrain Brand
Other
Shifting Type
Cable
Max Cog (T)
32[1]
Mount Standard
Standard Hanger
Weight (g)
258[2]
Sources
  1. [1] ltwoo.com, checked 29 Sep 2026: Max Cog (T)
  2. [2] ltwoo.com, checked 10 Aug 2026: Weight (g)

Offers

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Price history

Recorded when a retailer's price changes; each line holds until the next change.

  • Panda Podium

Compatibility

LTWOO RX Rear Derailleur (RD-R1212-M-A) is a LTWOO rear derailleur. It is a 12-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.

Chains for this derailleur20

Apex ChainShares a standard

SRAM

Apex Chain

  • Both are 12-speed
CN-M6100 HYPERGLIDE+ CHAIN 12sShares a standard

Shimano

CN-M6100 HYPERGLIDE+ CHAIN 12s

  • Both are 12-speed
CN-M7100 HYPERGLIDE+ CHAIN 12sShares a standard

Shimano

CN-M7100 HYPERGLIDE+ CHAIN 12s

  • Both are 12-speed
CN-M8100 HYPERGLIDE+ CHAIN 12sShares a standard

Shimano

CN-M8100 HYPERGLIDE+ CHAIN 12s

  • Both are 12-speed
CN-M9100 HYPERGLIDE+ CHAIN 12sShares a standard

Shimano

CN-M9100 HYPERGLIDE+ CHAIN 12s

  • Both are 12-speed
DLC 12Shares a standard

KMC

DLC 12

  • Both are 12-speed
e12Shares a standard

KMC

e12

  • Both are 12-speed
Eagle 70 Transmission Flattop ChainShares a standard

SRAM

Eagle 70 Transmission Flattop Chain

  • Both are 12-speed
Eagle S100 ChainShares a standard

SRAM

Eagle S100 Chain

  • Both are 12-speed
Eagle S200 ChainShares a standard

SRAM

Eagle S200 Chain

  • Both are 12-speed
Eagle S500 ChainShares a standard

SRAM

Eagle S500 Chain

  • Both are 12-speed
Force Chain (CN-FRC-D1)Shares a standard

SRAM

Force Chain (CN-FRC-D1)

  • Both are 12-speed
Force Chain (CN-FRC-E1)Shares a standard

SRAM

Force Chain (CN-FRC-E1)

  • Both are 12-speed
GX Eagle ChainShares a standard

SRAM

GX Eagle Chain

  • Both are 12-speed
GX Eagle Transmission Flattop ChainShares a standard

SRAM

GX Eagle Transmission Flattop Chain

  • Both are 12-speed
K-FORCE LIGHT MTB 12 SPEED CHAINShares a standard

FSA

K-FORCE LIGHT MTB 12 SPEED CHAIN

  • Both are 12-speed
NX Eagle ChainShares a standard

SRAM

NX Eagle Chain

  • Both are 12-speed
RED ChainShares a standard

SRAM

RED Chain

  • Both are 12-speed
Rival Chain (CN-RIV-D1)Shares a standard

SRAM

Rival Chain (CN-RIV-D1)

  • Both are 12-speed
Rival Chain (CN-RIV-E1)Shares a standard

SRAM

Rival Chain (CN-RIV-E1)

  • Both are 12-speed

Shifters that drive this derailleur14

RX Shifter (ST-R1206-R)Recommended

LTWOO

RX Shifter (ST-R1206-R)

  • Both are 12-speed
  • Both use cable actuation
RX Shifter (ST-R1209-R)Recommended

LTWOO

RX Shifter (ST-R1209-R)

  • Both are 12-speed
  • Both use cable actuation
AX Shift Lever (SL-A1206-R)Mechanically compatible

LTWOO

AX Shift Lever (SL-A1206-R)

  • Both are 12-speed
  • Both use cable actuation
AX Shift Lever (SL-A1216-R)Mechanically compatible

LTWOO

AX Shift Lever (SL-A1216-R)

  • Both are 12-speed
  • Both use cable actuation
EGR Shift Lever (SL-EG1202-R-C)Mechanically compatible

LTWOO

EGR Shift Lever (SL-EG1202-R-C)

  • Both are 12-speed
  • Both use cable actuation
ER9 Shift Switch (SW-ERT1100-R)Mechanically compatible

LTWOO

ER9 Shift Switch (SW-ERT1100-R)

  • Both are 12-speed
  • Both use cable actuation
GRT Shifter (ST-GR1209-R)Mechanically compatible

LTWOO

GRT Shifter (ST-GR1209-R)

  • Both are 12-speed
  • Both use cable actuation
TX Shift Lever (SL-T1206-R)Mechanically compatible

LTWOO

TX Shift Lever (SL-T1206-R)

  • Both are 12-speed
  • Both use cable actuation
🚲Shares a standard

microSHIFT

Bar End Shifter - Shimano MTB 1x12

  • Both are 12-speed
  • Both use cable actuation
🚲Shares a standard

microSHIFT

Bar End Shifter - SRAM MTB 1x12

  • Both are 12-speed
  • Both use cable actuation
🚲Shares a standard

microSHIFT

Bar End Shifters - Road 2x12

  • Both are 12-speed
  • Both use cable actuation
ER9 Shifter (ST-ERT1101-R)Shares a standard

LTWOO

ER9 Shifter (ST-ERT1101-R)

  • Both use cable actuation
  • Both are LTWOO drivetrain parts
🚲Shares a standard

microSHIFT

Thumb Shifter MTB 1x12 Shimano Compatible (SL-M12-R)

  • Both are 12-speed
  • Both use cable actuation
🚲Shares a standard

microSHIFT

Thumb Shifter MTB 1x12 SRAM Compatible (SL-SR-M12-R)

  • Both are 12-speed
  • Both use cable actuation

Frequently Asked Questions

What fits LTWOO RX Rear Derailleur (RD-R1212-M-A)?

On this page we list chains for this derailleur, cassettes for this derailleur, shifters that drive 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 LTWOO RX Rear Derailleur (RD-R1212-M-A)?

No. LTWOO RX Rear Derailleur (RD-R1212-M-A) is a 12-speed component and needs a 12-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 LTWOO RX Rear Derailleur (RD-R1212-M-A) work with electronic shifting like Di2 or AXS?

No. LTWOO RX Rear Derailleur (RD-R1212-M-A) is mechanical, cable-actuated. Electronic groups use internal motors and proprietary signalling, so there is no mechanical or electrical path between the two.