About SRAM GX 10 Speed Rear Derailleur
Leveraging the legendary history of SRAM shifting, the GX 2x10 rear derailleur provides incredible shifting speed and precision. EXACT ACTUATION™ technology eliminates slop and shifting variation. ROLLER BEARING CLUTCH™ technology delivers maximum drivetrain stability-even through the most punishing terrain. And with CAGE LOCK™ technology, wheel removal and installation are easier than ever.

Features
EXACT ACTUATION™ for precise and dependable 10-speed performance

TYPE 2.1 technologies: ROLLER BEARING CLUTCH™ and CAGE LOCK™ (also available without TYPE 2.1 configurations)

Cage length: Medium

Technology
CAGE LOCK: With CAGE LOCK technology in the rear derailleur, wheel removal and installation—as well as chain installation—becomes faster and simpler. Just push the cage forward to create slack and lock it into place.

DIRECT ROUTE: Here's the dirt on middlemen: they suck. That's why DIRECT ROUTE technology doesn't have one. Instead, the cable routes directly to the actuation mechanism. Result? Less friction. Less effort. More oomph. Plus it's impervious to cable housing damage. Nice.

EXACT ACTUATION: When SRAM launched their road technology from scratch they reapplied their MTB proven SRAM 1:1 actuation ratio (shifter cable travel : derailleur movement). EA helps to simplify and stabilize the uneasy act of balancing rear derailleur hanger design, tight cog spacing, and exact cable tension. The result: the easiest index shifting system to set up—and it stays that way.

ROLLER BEARING CLUTCH: ROLLER BEARING CLUTCH technology eliminates derailleur bounce and chain slap without sacrificing precision.

Specifications
Speed (RD): 10s

Cable Pull Ratio: Exact actuation

Cage (RD): Medium

Max Tooth: 36

Colour (RD): Black

Pulley Bearings Material: Steel

Cage Material (RD): Aluminum

Weight: 302g

Model ID: RD-GX-T21-A1

About SRAM
Founded in 1987, SRAM (an acronym of the 3 founders names, Scott, Ray and Sam) is a privately owned bicycle component manufacturer located in Chicago. They're known for developing many of the inovative technologies used in bikes today including ETAP wireless electric shifting, Grip Shift, dedicated single chain ring drivetrains, narrow wide chainrings and more. Sram also own bicycle component brands Rockshox, Quarq, Zipp and Truvativ.