Shimano | Grx Rd-Rx827 Rear Derailleur 12 Speed

Shimano GRX RD-RX827 Rear Derailleur Gravel, advanced. With off-pavement design features inspired by Shimano's XT and XTR series, the Shimano GRX RD-RX827 Rear Derailleur is the new standard for robust, gravel-optimized fully-wireless electronic rear derailleurs. Like the newest Shimano Di2 MTB rear derailleur offerings, this GRX RX827 features Shadow ES technology, a slimmer and stronger version of the revolutionary Shimano Shadow system, for increased chain stability over the roughest gravel and doubletrack. The RX827 is built to last, with a robust, wide link structure, skid plate design, solid pulley wheels, and Automatic Impact Recovery technology to reposition the derailleur after a crash or rock strike. Optimized for a massive 10-51t cassette, the RD-RX827 is purpose-built for the unique demands of gravel races and mixed-surface rides of all types. Features Fully-wireless Di2 shifting for the quick, precise shifts Di2 is known for, without the wires SHIMANO SHADOW ES technology a slimmer, sleeker, stronger evolution of the Shimano SHADOW RD+ chain stabilizing system Automatic Impact Recovery repositions the derailleur instantly after a crash or rock strike Covered pulley system shields moving parts for a more robust design Protected internal battery stays secure while being easy to remove for charging Robust design with a wide link structure, aluminum outer plate, and durable pulley for long-term reliability SPECIFICATIONSSpeeds12Chain Compatibility HG 12-speed Cassette Range Compatibility10-51TDrivetrain Compatibility1x12 | Shimano | Grx Rd-Rx827 Rear Derailleur 12 Speed