Shimano Rear Derailleur GRX DI2 11SPD - RD-RX817

With an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner. The RD-RX817 DI2 version offers the digital precision of SHIMANO electronic shifting and synchronized shifting. and is compatible with mtb cassettes with a 42T low sprocket max.

Silent and uninterrupted rear shifting on rough terrain
Adjustable chain stabilizer prevents chain slapping and drops
SHIMANO SHADOW RD
Smooth and reliable mixed surface shifting
Switch stabilizer ON/OFF to match the terrain
Gravel-tuned clutch tension
Compatible with current road DUAL CONTROL LEVER
Top sprocket: Max. 11T/Min. 11T
Low sprocket: Max. 42T/Min. 40T
Total capacity: 31T