Shimano GRX RD-RX817 Di2 rearmech

SHIMANO GRX - DI2 - rear derailleur - SHIMANO SHADOW RD+ - 42T max largest sprocket - 11-speed

With the integrated chain stabilizer, the SHIMANO GRX derailleur provides a quieter cycling experience and more reliable and precise shifting on varied terrain. For riding on flat roads, the derailleur has an on/off switch for the chain tensioner. The RD-RX817 DI2 version offers the digital precision of SHIMANO electronic shifting and synchronized shifting. It is also suitable for MTB cassettes with a maximum largest sprocket of 42T.

Silent and uninterrupted rear shifting on rough terrain
Adjustable chain stabilizer prevents chatter and chain slip
SHIMANO SHADOW RD+
Smooth and reliable shifting on varied terrain
Turn the stabilizer ON or OFF depending on the terrain
Gravel-tuned clutch tension
Suitable for current DUAL CONTROL LEVER for road bikes
Smallest sprocket: max. 11T/min. 11T
Largest sprocket: max. 42T/min. 40T
Total capacity: 31T
MODEL NO. RD-RX817
SERIES GRX DI2
Average weight 318
Top-Normal Suspension Type_SHADOW RD+ ✔
Mounting_Instant confirmation ✔
E-TUBE connector (pcs) 0
E-TUBE port (pc.) 1
Firmware update via E-TUBE Project ✔
Fluorine Coated Pivot Bushings 4
Largest sprocket_Max. 42T
Largest Sprocket_Min. 40T
Gears rear 11
Top derailleur pulley with sealed bearing ✔
Lower derailleur pulley with sealed bearing ✔
Smallest sprocket_Max. 11T
Smallest Sprocket_Min. 11T
Capacity 31T
SD300 connector (pcs) 0
SD300 Port (pcs) 0
SD50 connector (pcs) 0
SD50 Port (pcs) 1