Shimano GRX rear derailleur, RX812 11-speed model
* Adjustable chain stabilizer prevents chain slap and drops: SHIMANO SHADOW RD+
* Smooth and reliable shifting on mixed terrain
* Compatible with current road DUAL CONTROL LEVER
* The SGS model allows for cassettes up to 42 teeth
* The RX812 model is compatible with 1x drivetrains (mountain cassettes up to 42 teeth).