Engineered for reliable and precise shifting performance specifically on 10-speed gravel and adventure bike drivetrains.

The Shimano RD-RX400 GRX 10-Speed Rear Derailleur is a dedicated component from Shimano’s GRX gravel-specific groupset, designed to deliver smooth and stable shifting across varied terrain. Featuring a Shadow RD+ chain stabilizer (clutch mechanism), it significantly reduces chain slap and drops, ensuring silent operation and chain security over rough surfaces. Optimized for 10-speed systems with a maximum low sprocket of 36T, this derailleur provides crisp gear changes and robust durability, making it an ideal choice for gravel, adventure, and cyclocross riders seeking dependable performance off the beaten path.

• 10-speed specific design for Shimano GRX and other compatible drivetrains.
• Shadow RD+ chain stabilizer (clutch) reduces chain slap and improves chain retention.
• Optimized for gravel and mixed-surface riding, ensuring stable and silent shifting.
• Maximum low sprocket compatibility of 36T for versatile gearing.
• Robust and durable construction designed for demanding off-road conditions.