Rear Derailleur Sram Gx 2.1 Long Cage 11-Speed

11-Speed SRAM GX 2.1 Long Cage Rear Derailleur

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11-Speed SRAM GX 2.1 Long Cage Rear Derailleur

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.


  • 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.
  • Approximate weight is 265 grams.
  • Maximum sprocket size is 42T.


With Cage Lock technology in the rear derailleur, wheel removal and installation - and chain installation - becomes faster and simpler. Just push the cage forward to create slack and lock it into place.


The Roller Bearing Clutch Eliminates derailleur bounce and chain slap without sacrificing precision.


The rear derailleur’s “Straight Parrallelogram” design limits all movement to the horizontal axis. The derailleur doesn’t move up or down - just straight across. This makes ghost shifting impossible while also reducing shift force. For quicker, more exact shifting, the large upper puller offset design maintain a constant chain gap across all gears.

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