Wireless electronic eTap shift logic for intuitive shifting, easy setup and reliability Orbit chain management technology keeps the drivetrain quiet and secure 1x specific for use with 10-44 XPLR cassettes and 10-36 cassettes SRAM AXS enabled, allowing easy personalization Larger X-SYNC pulleys for increased durability and efficiency Compatible with existing eTap batteries (battery not included) SRAM Model ID: RD-RED1-E-D1
