LTWOO GRT13 Rear Derailleur (RD-GR1310-L-A)

Rear Derailleur

Specifications

Manufacturer: LTWOO
Name: GRT13 Rear Derailleur (RD-GR1310-L-A)
Series: GRT13
MPN: RD-GR1310-L-A
Rear Speeds: 13
Drivetrain Brand: Other
Shifting Type: Cable
Max Cog (T): 50^[1]
Cage Length: Long^[1]
Mount Standard: Standard Hanger
Weight (g): 283^[1]
Sources: [1] ltwoo.com, checked 10 Aug 2026: Max Cog (T), Cage Length, Weight (g)

Compatibility

LTWOO GRT13 Rear Derailleur (RD-GR1310-L-A) is a LTWOO rear derailleur. It is a 13-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.

Cassettes for this derailleur1

Shares a standard

FSA

K-FORCE WE12S

Both are FSA drivetrain parts
The cassette's 32T largest cog is within the derailleur's 50T maximum

Chains for this derailleur5

Shares a standard

SRAM

Force Chain (CN-FRC-E1)

Both are 13-speed

Shares a standard

SRAM

RED Chain

Both are 13-speed

Shares a standard

SRAM

Rival Chain (CN-RIV-E1)

Both are 13-speed

Shares a standard

KMC

WAX XFLAT

Both are 13-speed

Shares a standard

KMC

WAX XSL FLAT

Both are 13-speed

Shifters that drive this derailleur3

Mechanically compatible

LTWOO

AX13 Shift Lever (SL-A1306-R)

Both are 13-speed
Both use cable actuation

Mechanically compatible

LTWOO

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

Both are 13-speed
Both use cable actuation

Shares a standard

LTWOO

ER9 Shifter (ST-ERT1101-R)

Both use cable actuation
Both are LTWOO drivetrain parts

Frequently Asked Questions

What fits LTWOO GRT13 Rear Derailleur (RD-GR1310-L-A)?

On this page we list cassettes for this derailleur, chains 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 GRT13 Rear Derailleur (RD-GR1310-L-A)?

No. LTWOO GRT13 Rear Derailleur (RD-GR1310-L-A) is a 13-speed component and needs a 13-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 GRT13 Rear Derailleur (RD-GR1310-L-A) work with electronic shifting like Di2 or AXS?

No. LTWOO GRT13 Rear Derailleur (RD-GR1310-L-A) is mechanical, cable-actuated. Electronic groups use internal motors and proprietary signalling, so there is no mechanical or electrical path between the two.