Shimano GRX Rear Derailleur-RD-RX812

Features

Quiet and uninterrupted rear shifting performance on rough terrain

Adjustable chain stabilizer prevents chain from swinging and falling

SHIMANO SHADOW RD+

Shifting performance on mixed surfaces is smooth and stable

Turn on/Turn off the stabilizer to match the terrain

GRAVEL Adjustable clutch tension

Applicable to current road vehicles DUAL CONTROL LEVER

High rear flywheel sprocket: maximum 11T/ minimum 11T

Low rear freewheel sprocket: maximum 42T/ minimum 40T

Total tooth capacity: 31T