Shimano GRX RD-RX825 Di2 12 Speed Rear Derailleur

Shimano GRX RD-RX825 Di2 12 Speed Rear Derailleur

• Compact design with integrated wireless unit, charging port, and switch.

• Fast and reliable shifting on rough terrain.

• Adjustable chain stabilizer prevents chain slap.

• Gravel-tuned clutch tension.

• Switch stabilizer ON/OFF to match terrain - ON for gravel, OFF for smooth roads.

• LED battery status indicator.

• Integrated D-FLY Connectivity and Charging.

• Compatible with 11-34T and 11-36T 12-speed cassettes.

Electrifying Shimano's 12-speed gravel component family, the new 2 x 12-Speed GRX RX825 Di2 components combine Shimano's unrivalled electronic shifting with optimized gearing options for riding, racing, and all-day adventures.

Designed for gravel riders who live to be in the moment, who venture down lonely, unknown dirt roads, who take on routes and races with unpredictable outcomes, Shimano GRX 12-speed Di2 delivers precise, reliable, distraction-free performance in all conditions.

Shimano's GRX Di2 12-speed rear derailleur features a built-in wireless connectivity unit and charging port, ensuring fast and reliable shifting for mixed-terrain riding and easy recharging. Integrated Shadow RD+ technology prevents chain slap and ensures precise shifting even on rough terrain. Thanks to the built-in ON/OFF switch, wheel removal is easy too. The RD-RX825 is compatible with 11-34T and 11-36T 12-speed cassettes and supports Full or Semi-Synchronized shift modes, enhancing rider customization.

Technical specifications:

• Speeds: 12-speed

• Shifting: Electronic, Di2

• Top sprocket: Max. 11T/Min. 11T

• Low sprocket: Max. 36T/Min. 34T

• Total capacity: 40T

• Weight: 310g

Compatible cassettes:

• CS-HG710 11-36T 12-speed

• Dura Ace CS-R9200 11-34T 12-speed.

• Ultegra CS-R8100 11-34T 12-speed.

• 105 CS-R7100 11-34T 12-speed.