The SRAM GX Eagle rear derailleur is the workhorse of the Eagle lineup — delivering the full 10-52T gearing range at a price point that makes 12-speed 1x genuinely accessible. X-ACTUATION cable pull geometry keeps shifting precise across the full cassette range, and the cage is designed to handle the demands of trail and enduro riding without the premium of X01 or XX1.

Highlights

  • 12-speed Eagle 1x MTB rear derailleur — GX tier
  • X-ACTUATION cable pull for consistent indexing from 10T to 52T
  • Compatible with GX Eagle trigger shifters and NX Eagle shifters
  • 10-52T XD cassette capacity
  • Trail and enduro capable — durable GX construction

GX Eagle value

GX Eagle delivers the full Eagle 12-speed range without the weight reduction measures that add cost to X01 and XX1 — it uses heavier alloys where lighter titanium or carbon would be used up the range, but the shifting system and tooth geometry are identical. The practical shift feel is the same; the weight difference is what you're paying for at higher tiers.

Fit and compatibility

12-speed Eagle rear derailleur. Compatible with SRAM Eagle 12-speed shifters and Eagle cassettes. Requires XD driver freehub for Eagle cassettes. Confirm maximum cog size before ordering.

Installation. Service. Compatibility. Find all the documentation needed to set up, use, and maintain your components in the SRAM Service hub.

Visit product service page
Features
  • Backwards compatible, works with both 10-50t and new 10-52t cassettes.
  • Updated cage architecture provides better chain retention and precise shifts.
  • Comes in GX Eagle signature colorway as part of Eagle Colorsystem and goes with all colors of Eagle cassettes & chains – from Black to Gold to Rainbow, to HardChrome and new Copper.

Specifications

Cage (RD) Long
Cable pull ratio X-actuation
Speed (RD) 12s
Color (RD) Lunar
Cage material (RD) Aluminum
Pulley bearings material Steel
Max tooth 52
SKU SRM-RD-GX-1-B2
Model # RD-GX-1-B2
Barcode # RD-GX-1-B2
Brand SRAM