Shimano GRX Di2 Rear Derailleur RD-RX817

Designed for riding on rough roads, through gravel and mud, to be able to carry on in comfort, stress-free, to wherever you want, to allow you to achieve that unique sense of accomplishment. The first groupset designed for Gravel riding Explore beyond. Introducing SHIMANO GRX
. Shimano Shadow RD+ for DI2 (11-speed)
. Adjustable chain stabilizer prevents chain slapping and drops
. Switch stabilizer ON/OFF to match the terrain
. Gravel-tuned clutch tension
. Silent and uninterrupted rear shifting on rough terrain
. Smooth and reliable mixed surface shifting
. Compatible with current road DUAL CONTROL LEVER
. Top sprocket: Max. 11T/Min. 11T
. Low sprocket: Max. 42T/Min. 40T
. Total capacity: 31T