On any surface you can imagine, in any drivetrain configuration, the SRAM Rival eTap AXS rear derailleur will handle it. Secure chain management and fast, precise shifting make for a smooth and quiet ride, every time.AXS is as you know Sram\'s new bike component integration system that connects electronic bicycle components and software. The SRAM AXS app allows riders to see battery status, change component behavior and personal controls to suit you riding. You can if you wish receive mainrenance updates and firmware update notifications.KEY FEATURESWireless electronic eTap shift logic for intuitive shifting, easy setup and reliability.Compatible with both 1x and 2x drivetrains.36T cog max derailleur works with 10-28T, 10-30T, 10-33T, and 10-36T cassettes.SRAM AXS enabled, allowing easy personalization.Spring clutch keeps the drivetrain quiet and secure.X-SYNC pulleys for increased durability and efficiency.SPECIFICATIONCAGE (RD): N/aCABLE PULL RATIO: N/aSPEED (RD): 12 SpeedCOLOUR (RD): BlackCAGE MATERIAL (RD): AluminiumPULLEY BEARINGS MATERIAL: SteelMAX TOOTH: 36 T