The SRAM XO AXS T-Type Rear Derailleur Transmission is a high-quality, 12-speed rear derailleur designed specifically for mountain bikes. Made from carbon, this derailleur is durable and lightweight, providing smooth and precise gear changes. The long cage derailleur cage ensures compatibility with a wide range of gear ratios, making it a reliable choice for riders looking to upgrade their bike's performance. With its sleek black color and top-notch SRAM brand reputation, this rear derailleur is a must-have component for serious cyclists.