The SRAM X01 DH rear derailleur is a dedicated 7-speed downhill mechanism built around the X-HORIZON parallelogram and a robust Type 3.0 roller bearing clutch for maximum chain control on the roughest descents. Race-proven 7-speed downhill shifting with rock-solid chain retention — genuine SRAM, brand new. Will it fit? For SRAM 7-speed downhill (DH) drivetrains running an X01 DH / GX DH 7-speed cassette and trigger shifter. Single-chainring (1x) only; mounts to a standard 10×1 hanger. Not compatible with 10/11/12-speed road or trail cassettes. Key Specifications Brand SRAM Series X01 DH Model RD-X01DH-A1 MPN RD-X01DH-A1 UPC 710845837203 Type Rear Derailleur Speeds 7-Speed Drivetrain 1x7 Downhill Cage Type 3.0 Roller Bearing Clutch Design X-HORIZON, Cage Lock Mounting Type Standard 10×1 Hanger Weight 290 g (10.2 oz) Color Black Country of Origin Taiwan Condition Brand new — original SRAM retail packaging Technology Highlights ✓ X-HORIZON design keeps chain gap constant for fast, precise shifts. ✓ Type 3.0 Roller Bearing Clutch eliminates chain bounce and slap. ✓ Cage Lock simplifies wheel and chain installation. ✓ Dedicated 7-speed DH ratio tuned for downhill cassettes. ✓ X-SYNC pulleys for maximum chain management. What's in the Box 1 × SRAM X01 DH rear derailleur Original SRAM retail packaging Brand new in retail packaging. Ships from Ontario, California (US domestic) · Estimated delivery 3–5 business days · Free 30-day returns.