The SRAM GX 1x11 X-HORIZON rear derailleur brings consistent, precise 1x shifting to mid-range MTB builds. X-HORIZON geometry maintains a more horizontal cage path through its range of motion — reducing chain tension inconsistency over rough terrain and keeping the chain more securely on the cassette without a separate clutch mechanism.

Highlights

• GX 11-speed 1x MTB rear derailleur with X-HORIZON geometry
• X-ACTUATION cable pull for consistent indexing across the cassette
• Compatible with GX 11-speed trigger and Grip Shift shifters
• Wide-range cassette capacity for 1x off-road gearing
• Durable GX-level construction for trail riding

X-HORIZON geometry

X-HORIZON uses a more horizontal arm sweep than a traditional parallelogram derailleur — the cage moves more parallel to the cassette face rather than sweeping in an arc. The result is more consistent chain tension through the derailleur's travel, which improves chain retention and shift quality particularly on rough surfaces.

Fit and compatibility

11-speed MTB 1x rear derailleur. Compatible with SRAM GX 11-speed shifters and 11-speed cassettes. Confirm maximum cog size and cage length for your cassette range before ordering.