The Shimano RD-RX812 Rear Derailleur GRX 11-Speed is designed for smooth and reliable shifting performance on 11-speed drivetrains. With a maximum capacity of 42T and a medium cage length, this derailleur is perfect for riders looking for precise gear changes. The Shadow technology ensures chain stability, making it ideal for off-road adventures and gravel riding. Upgrade your bike with the RD-RX812 for a more efficient and enjoyable cycling experience.