SRAM, Rival AXS E1, Rear Derailleur, Speed: 12, Black

• Chain management technology keeps the drivetrain quiet and secure
• AXS enabled for easy setup, personalization, and reliability
• Compatible with both 1x and 2x drivetrains
• Compatible with cassettes from 10-28T to 10-36T
• Larger X-SYNC lower pulley for increased efficiency
• SRAM Model ID: RD-RIV-E-E1