Sharp, consistent 1x shifting in a tough, no-nonsense package. The SRAM NX 1x11 X-Horizon rear derailleur brings the core technologies of SRAM's premium 1x groupsets to a price that makes single-ring drivetrains accessible, with a built-in clutch to keep your chain quiet and secure over rough ground.

Highlights

• Purpose-built for 1x (single chainring) drivetrains
• 11-speed with X-Actuation cable pull for crisp, repeatable shifts
• Long cage handles cassettes up to a 42-tooth largest cog
• Roller Bearing Clutch keeps the chain taut to stop slap and dropped chains
• Cage Lock makes wheel and chain installation quick and clean

Quiet, secure chain control

The Roller Bearing Clutch manages chain tension to eliminate derailleur bounce and chain slap on descents and rough trails, without dulling shift performance. That means fewer dropped chains and a noticeably quieter ride.

Precise 1x shifting

X-Horizon geometry uses a straight parallelogram that limits movement to the horizontal axis, making ghost shifting impossible and reducing shift force. X-Actuation, developed specifically for SRAM 1x, keeps shifting sharp and consistent across the entire cassette.

Faster maintenance

Cage Lock lets you push the cage forward to create slack and lock it in place, so removing a wheel or installing a chain is quicker and less fiddly.

Compatibility and fit

This is an 11-speed, 1x-only rear derailleur and cannot be used with double or triple chainrings. It pairs with SRAM 11-speed X-Actuation trigger shifters and SRAM 11-speed 1x cassettes (largest cog up to 42 teeth). Use a SRAM 11-speed chain for correct operation. Mounts to a standard rear derailleur hanger.