Shimano GRX Di2 RD-RX827-SGS 12v rear derailleur

The all-new GRX RX827 gearbox combined with a 10-51D cassette offers speed, range and durability ideal for any gravel route, whether racing or leisure. Thanks to Automatic Impact Recovery, high impact absorption profile and sturdy pulleys, the derailleur resists impacts, ensuring instant gear changes every time.

Robust design
The wide link structure, derailleur plate design, aluminium plate durability and pulley strength add robustness and longevity.

RD Protection function
The new Automatic Impact Recovery function instantly returns the derailleur to its original position after impact.

Shimano Shadow Es
The slimmer and more robust evolution of SHADOW RD+, SHIMANO's pioneering chain stabilisation concept.

Protected battery
Hidden safely inside an enclosed space, the battery does not move even on the roughest terrain, while remaining easily removable for recharging.

Tech spec

• Series: GRX
• Sprockets: 12
• Mounting: Direct mount (conventional)
• Max front difference: 0D
• Total capacity: 41D
• Min sprocket: 51D
• Max sprocket: 10D
• Fluorine-coated bushings: TBD
• Cable guide pulley: Cartridge bearing
• Sealed bearing: ✔
• Pulley teeth: 13
• Recessed pulley pin: TBD
• Mounting axle: Hollow axle
• Di2 gear shift: ✔
• Custom Bluetooth® LE (*1)|Adjustment mode information
• Firmware updated by E-TUBE PROJECT: ✔
• System status LED: ✔