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SRAMSRAM · Rear Derailleurs

SRAM GX Type 2 10-Speed Short Cage Rear Derailleur, Black

Dependable 10-speed MTB shifting with chain control built in.

$134.99

Only 2 left · Ready to pick up from Ashburton Cycles

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10-speed
Speeds
Short cage
Cage
Black
Colour
36T
Max cassette tooth

Overview

A good fit for riders restoring or maintaining a SRAM Exact Actuation 10-speed MTB drivetrain who want clutch-equipped shifting and a short-cage derailleur.

This 10-speed MTB rear derailleur is built around SRAM’s Exact Actuation shifting system, giving you precise indexing with a straightforward setup. The short cage is suited to compatible 10-speed drivetrains using 1x, 2x or 3x configurations, with a published maximum cassette size of 36T.

SRAM’s Type 2.1 package combines Roller Bearing Clutch and Cage Lock technology. The clutch helps reduce derailleur movement, chain bounce and chain slap on uneven trails, while Cage Lock lets you push the cage forward and hold it in place for easier chain fitting and wheel removal. Direct Route cable routing is designed to reduce friction and shifting effort.

With an aluminium cage, steel pulley bearings and a black finish, this is a sensible choice when you need reliable SRAM 10-speed replacement performance without moving to a newer drivetrain standard. For compatibility, match it with an Exact Actuation 10-speed shifter and a compatible cassette within the published 26T, 28T or 36T minimum options and 36T maximum.

Exact Actuation shifting

SRAM’s precise actuation ratio helps deliver dependable 10-speed indexing and keeps setup straightforward.

Short cage design

A compact cage for compatible 10-speed 1x, 2x and 3x drivetrain configurations.

36T maximum cassette

Supports compatible 10-speed cassette setups up to a 36-tooth largest sprocket.

Roller Bearing Clutch

Controls derailleur movement to help reduce chain bounce and chain slap on rough terrain.

Cage Lock

Locks the cage forward to create chain slack, making wheel and chain removal simpler.

Direct Route cable routing

Routes the cable directly to the actuation mechanism to reduce friction and shifting effort.

Aluminium cage

Uses an aluminium cage with steel pulley bearings for a practical, durable construction.

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Specifications

General

Model ID
RD-GX-T21-A1
Speed
10
Colour
Black
Cage length
Short
Maximum cassette tooth
36
Minimum cassette options
26, 28, 36
Drivetrain configuration
1x, 2x, 3x
Communication protocol
n/a

Materials & construction

Cage material
Aluminium
Pulley bearings material
Steel

Compatibility

Cable pull ratio
Exact Actuation
Shift technology
Exact Actuation
Chain technology
10 Speed Powerchain
Compatible cassette range published for the GX 10-speed platform
10-speed cassettes from 26T, 28T and 36T minimum options; up to 36T maximum

Weight

Published weight
302 g
Weight basis
RD 2x10 Long Cage Black

Features

Type 2.1 technologies
ROLLER BEARING CLUTCH and CAGE LOCK
Available cage lengths in the model family
Short, Medium and Long
Recommended drivetrain configurations
1x, 2x and 3x

Technology

TYPE 2.1

Combines ROLLER BEARING CLUTCH and CAGE LOCK technology to improve chain control and simplify wheel and chain removal.

EXACT ACTUATION

Uses SRAM's precise actuation ratio to deliver dependable 10-speed indexing with less shifting variation and straightforward setup.

ROLLER BEARING CLUTCH

Controls derailleur movement to reduce bounce and chain slap while maintaining precise shifting.

CAGE LOCK

Locks the derailleur cage forward to create chain slack, making wheel removal, wheel installation and chain fitting faster and easier.

DIRECT ROUTE

Routes the cable directly to the actuation mechanism for lower friction, lighter shifting effort and improved resistance to cable-housing damage.

10 Speed Powerchain

Specifies the SRAM 10-speed chain technology supported by the derailleur's shifting system.

About SRAM

SRAM is an American bicycle component manufacturer founded in Chicago in 1987. The company produces cycling components for road, gravel and mountain bikes, including drivetrains, brakes, suspension, wheels and electronic systems.

SRAM began with Grip Shift gear-change technology and expanded through product development and acquisitions across the cycling component market. Its portfolio includes SRAM, RockShox, Avid, Truvativ, Zipp, Quarq, Hammerhead and other cycling brands.

  • Founded in 1987
  • Headquartered in Chicago, United States
  • Known for road, gravel and mountain-bike components
  • Developed Grip Shift gear-change technology

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