Product Description Elevate your mountain biking experience with our Shimano XTR Di2 RD-M9250-SGS 12 speed shift system, designed specifically for the all-mountain, cross country, enduro, and MTB riders who demand precision and reliability. A key innovation is the integrated battery now housed directly within the derailleur body — well protected and removable for easy charging. This system, compatible with HG 12-speed chains and a 12-speed cassette, ensures smooth and swift gear changes to keep you ahead on any trail. The combination of aluminum and carbon materials not only guarantees durability but also reduces weight, making your ride faster and more efficient. The outer and inner cages, crafted from carbon, offer unparalleled strength and a sleek look. Its standard mounting system makes installation a breeze, allowing you to quickly get back to what you love doing most. Whether you're tackling steep climbs or fast descents, this shift system provides the performance you need to conquer any challenge. Get ready to experience unmatched control and responsiveness on every ride. Information regarding the return of batteries and electrical equipment: Information on the return and disposal of used batteries and electrical equipment can be found here. For information regarding the return of used e-bike batteries, please contact our customer service. Product Specifications: Damping:Yes Gearing levels cassette:12-speed Compatible chain:HG 12-speed Mounting:Standard Application:All Mountain, Cross Country, Enduro, MTB Shift System:Wireless black-silver | Long: Capacity:41 teeth Max cassette teeth:51 teeth Cage length:Long Technical Information: Material:Aluminum :Carbon Outer cage material:Carbon Product Features: - A cutting-edge wireless shifting system designed for MTB, perfect for All Mountain, Cross Country, and Enduro applications. - Outer and inner cage made of carbon for lightweight durability and enhanced shifting performance. - Compatible with HG 12-speed chains, ensuring smooth and reliable gear changes. - Constructed from aluminum, offering a robust and lightweight solution for demanding trails. - Supports a 12-speed cassette, providing a wide range of gearing options for various terrains. Manufacturer Number: black-silver | Long: IRDM9250SGSA Contents: - 1 x Shimano XTR Di2 RD-M9250-SGS 12-speed rear derailleur Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com