The SX Eagle rear derailleur is your entry point to the SRAM Eagle Ecosystem. Sharing many features with the rest of the Eagle Ecosystem like the proven SRAM 1x-specific X-HORIZON™ body design, it can accommodate both 11-50T and 10-50T cassettes. The SX Eagle is cross-compatible with much of the Eagle Ecosystem, making it easy to personalize and upgrade your ride when you are ready. Details: Series: SX Eagle Cage: Long Speeds: 12 Max Cassette Teeth: 50 Cable Pull Ratio: X-actuation Compatibility: SRAM Eagle 10-50t & SRAM 11-50t cassettes All SRAM Eagle 12-speed chains All SRAM Eagle 12-speed trigger shifters