The SRAM Apex XPLR AXS Rear 12-Speed Derailleur is crafted for those who need a reliable 12-speed 1x drivetrain. This derailleur is perfect for wide-range cassettes, accommodating large cogs of 36T or 44T. It features a spring clutch to ensure smooth chain management, whether you're on the road or off it. With intuitive eTap shift logic and AXS connectivity, the SRAM Apex XPLR AXS Rear 12-Speed Derailleur offers a seamless riding experience. Features AXS enabled for straightforward setup, personalisation, and dependability Designed for 1x use with 11-44T XPLR, 10-44T XPLR, and 10-36T cassettes Chain management ensures a quiet and secure drivetrain Specifications Speed (RD): 12s Cable pull ratio: n/a Cage (RD): n/a Max tooth: 44 Colour (RD): Black Pulley bearings material: Steel Cage material (RD): Aluminium