The SRAM GX X-HORIZON™ rear derailleur is engineered for smooth, reliable shifting action-from the larger upper pulley offset to the 12-tooth X-SYNC™ pulley wheels. By eliminating unwanted chain movement, X-HORIZON™ shifts faster, puts an end to ghost shifting and reduces shift force and chain slap. And with CAGE LOCK™ technology, wheel removal and installation are easier than ever.

Features:
- X-HORIZON™ design reduces shift force, ghost shifting and cage slap
- 12-tooth X-SYNC™ pulley wheels
- Large upper pulley offset automatically adjusts chain gap
- Sealed cartridge bearings
- Aluminum cage

Specifications:
Cage (RD) Long
Cable pull ratio X-actuation
Speed (RD) 11s
Color (RD) Black, Red
Cage material (RD) Aluminum
Pulley bearings Steel
Max tooth 42
Weight (g) 265
Weight Based On RD 1x11 Long Cage Black