The Shimano Ultegra Di2 RD-R8150 derailleur is a state-of-the-art electronic shifting solution specifically designed for road bikes. With its 12-speed setup, it offers precise and rapid gear changes that significantly enhance the riding experience. The Shadow design ensures a compact build that not only optimizes aerodynamics but also increases safety by reducing the risk of damage. With a maximum sprocket size of 34 teeth and a shifting capacity of 39 teeth, this derailleur is ideal for challenging routes and provides a wide range of gear ratios. The electronic shifting system allows for effortless operation and ensures consistent performance under various conditions.

• Electronic shifting system for precise gear changes
• Shadow design for improved aerodynamics and protection
• Maximum sprocket size of 34 teeth for versatile applications
• Lightweight construction at just 261 grams.