What is the SRAM Rival XPLR AXS D1 rear derailleur for?

The SRAM Rival XPLR AXS D1 rear derailleur is the previous-generation 12-speed XPLR gravel derailleur, designed for use with 10-44t XPLR and 10-36t cassettes with Flattop chains. It is a dedicated 1x-specific unit built around wireless eTap shift logic and AXS connectivity for smooth, precise gravel shifting. Advanced chain management and a proven AXS wireless system make this a reliable choice for gravel and mixed-terrain riding. Not compatible with Eagle cassettes or chains. Max cassette: 44t.

The D1 is the earlier-generation XPLR derailleur. If you are building or servicing a D1-generation Rival XPLR drivetrain, this is the correct replacement unit. Confirm your XPLR cassette and chain generation before ordering.