Shimano Ultegra RD-R8150 Di2 12-speed E-tube Rear Derailleur. The Ultegra Shadow design with Di2 t...Shimano Ultegra RD-R8150 Di2 12-speed E-tube Rear Derailleur. The Ultegra Shadow design with Di2 technology ensures easy and precise shifting with just a light touch. The rear derailleur acts as the brain of the system, featuring wireless connectivity to the shifters, charging point, ANT+ connection for third-party devices, and replacing the handlebar junction. It includes a button for Di2 operations and an LED light indicating synchronized shift mode, setting mode, and charge status. The low-profile Shadow design construction reduces the risk of damage in a crash. Programmed automatic motion at the touch of a switch makes shifting quick, smooth, and effortless. The removal of traditional mechanical cables in favor of electrical wires eliminates poor shifting caused by contaminants, corrosion, and stretching, while providing effortless gear shifts.
Shimano Ultegra RD-R8150 Di2 12-speed E-tube Rear Derailleur. The Ultegra Shadow design with Di2 technology ensures easy and precise shifting with just a light touch. The rear derailleur acts as the brain of the system, featuring wireless connectivity to the shifters, charging point, ANT+ connection for third-party devices, and replacing the handlebar junction. It includes a button for Di2 operations and an LED light indicating synchronized shift mode, setting mode, and charge status. The low-profile Shadow design construction reduces the risk of damage in a crash. Programmed automatic motion at the touch of a switch makes shifting quick, smooth, and effortless. The removal of traditional mechanical cables in favor of electrical wires eliminates poor shifting caused by contaminants, corrosion, and stretching, while providing effortless gear shifts.