SRAM GX 1x 11-Speed Long Cage Rear Derailleur Black

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
Aluminium cage

Specification:

Speed (RD): 11s
Cable pull ratio: X-actuation
Cage (RD): Long
Max tooth: 42
Colour (RD): Black, Red
Pulley bearings material: Steel
Cage material (RD): Aluminium