The Shimano XTR RD-M9100-SGS is a 12-speed rear derailleur for mountain bikes, equipped with a long cage (SGS) and offering a total capacity of 41 teeth. It is compatible with cassettes ranging from 10 to 51 teeth. Made from cold-forged aluminum, it ensures reliable shifting performance in demanding terrain conditions. This derailleur supports both 1x and 2x chainring setups, providing versatility for various riding styles. Weighing 240 grams, it contributes to a lightweight bike setup without compromising functionality. The mechanical shifting mechanism allows for precise gear changes and enhances control on trails. The black finish gives it a sleek appearance, and the derailleur is delivered in workshop packaging without retail box. The packaging dimensions are 2.33 cm in length, 1.55 cm in width, and 1.09 cm in height, with a package weight of 500 grams. It is manufactured in China and belongs to the high-performance XTR series, suitable for unisex applications in mountain biking.