Engineered for lightning-fast, ultra-precise 12-speed electronic shifting, delivering unmatched chain security and performance for demanding gravel and adventure riding.

The Shimano GRX RD-RX827 12-speed Di2 Rear Derailleur stands as the heart of Shimano's latest electronic gravel groupset, meticulously designed for the rigors of off-road exploration. This GRX Di2 derailleur provides instantaneous and incredibly accurate gear changes, ensuring flawless power transfer and optimal chain management across wide-range 1x setups. Its robust construction and integrated Shadow RD+ chain stabilizer (clutch) deliver exceptional durability and virtually eliminate chain slap, maintaining unwavering reliability in the most challenging conditions, making it ideal for gravel racing and adventure riding.

• 12-speed electronic shifting specifically for GRX 1x setups.
• Shadow RD+ chain stabilizer (clutch) for superior chain retention and silent operation.
• Delivers instantaneous and ultra-precise gear changes.
• Robust and durable construction built to withstand aggressive gravel conditions.
• Optimized for wide-range gravel cassettes.