The Deore M6250 Di2 Upgrade Kit from SHIMANO quickly and easily transforms an existing mechanical 12-speed mountain bike shifting system into an electronic shifting system. Included in the scope of delivery are the Di2 rear derailleur, designed for a 10-51T cassette shift range, the ergonomically adjustable Di2 shift lever, which can be mounted directly on the Shimano brake lever or via a clamp on the handlebars, the new Di2 battery, which connects directly to the derailleur, and a charger with USB-C port. The Shimano Deore Di2 rear derailleur RD-M6250 impresses with its robust construction and is equipped with the new chain stabilizer "Shadow ES." This effectively reduces chain bounce and ensures consistent and precise chain guidance. Thanks to its slimmer design, the risk of lateral impacts is minimized. If a collision does occur, the derailleur automatically disengages the mechanism to protect itself and subsequently returns to its starting position. The wireless installation makes the conversion particularly time-efficient and straightforward. Since the chain needs to be opened, an appropriate replacement chain link is included in the kit. The Shimano Deore M6250 Di2 Upgrade Kit is designed for 12-speed shifting systems from Shimano and elevates the shifting feel and reliability of gear changes to a new level.