Or as low as 
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.
Product features
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- Technology:
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- X-Actuation
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- X-Sync
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- X-Horizon
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- Cage Lock
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- Roller Bearing Clutch
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- Technology:
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- Type: 2.1
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- Gears: 1 x 11
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- Cage: long Cage
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- Material: Aluminium
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- Pulleys: Industrial Bearings
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- Compatibility: max. 42T
