SRAM Rival XPLR eTap AXS Rear Derailleur – 12-Speed 44t Max Black D1. If your ride doesnt feel complete until you get a little dirt on your tires you know the importance of capable components that can tackle anything. The SRAM Rival XPLR eTap AXS rear derailleur is a dedicated 1x-specific unit designed for use with the XPLR 10-44 cassette. It makes for an uncluttered drivetrain that takes on pavement and singletrack with equal aplomb. Wireless and proven eTap shift logic AXS connectivity and advanced chain management mean this derailleur does exactly what you want when you need it.

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