Shimano GRX RD-RX812 1x11V Rear Derailleur

Thanks to the steady growth in popularity of gravel, cyclocross and touring disciplines, Shimano was able to invest its knowledge and enthusiasm in something completely new. Keeping the shifting extremely precise and the chain in place on any terrain was something of a challenge, but it was overcome thanks to a series of changes from both the MTB and Road models. Thus, the built-in stabilizer (clutch) reliably prevents the chain from banging against the gearbox and the frame while remaining in place. When driving on road surfaces, where chain control is not vital, the clutch can be deactivated by simply moving the dedicated lever. The gearbox is equipped with its own adjustment screw, on which the cable tension can be adjusted, and pulleys with sealed and extremely efficient bearings. In the 1x11 configuration it will be an excellent choice for the most demanding challenges.

Characteristics

• Clutch: stabilizes gear shifting and keeps the chain in place.

• Profile: Shimano Shadow RD.

• Compatible with the current road Dual Control Lever.

• Lower sprocket: Max. 42T/Min. 40D.

• Upper sprocket: Max. 11T/Min. 11D.

• Chain compatibility: HG-EV / HG-X11 11V.

• Pulleys: 11D.

Technology