- X-Actuation ratio specifically engineered for SRAM's 1x11-speed mountain drivetrain
- X-Horizon design aligns the parallelogram to a horizontal axis providing constant chain gap across all 11 gears resulting in fast, precise shifts with reduced shifter force
- Type-2 (T2): self lubricating, roller bearing clutch mechanism provides one-way friction damping to cage improving chain stability and reducing chain-slap/noise, with an incorporated CageLock feature for faster wheel changes and chain service
- X-Sync 12-tooth pulley design reduces noise and maximizes chain control by alternating wide/narrow teeth to mirror chain profile, while upper pulley offset maintains chain gap to cassette
- Forged aluminum links, B-knuckle, and inner cage with an aluminum outer cage
| Model | X1 Type 2.1 |
| Mount | 10x1 Standard |
| Speed | 11 |
| Cage | Medium |
| Retention | Clutch |
| Min/Max | 10/42t |
| Capacity | 32t |
| Weight | 256g |
| Color | Black |
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