Shimano GRX RD-RX400 10sp. rear derailleur Shadow Plus - Unpacked

Description

On gravel and rough terrain, what you want most is a calm drivetrain and the confidence that shifting won’t let you down. The Shimano GRX RD-RX400 10sp. Shadow Plus rear derailleur keeps the chain under control and helps you maintain pace even through demanding sections. The Unpackaged version is practical when you’re dealing with servicing or building a bike without unnecessary extras.

Main benefits

It supports gravel and cyclocross use with stable operation, so shifting feels precise even on uneven ground. Shadow Plus technology lets you lock the cage and reduce chain slap when riding off-road. The derailleur is designed for a Shimano 2x10 system, so it fits well into common gravel builds. Compatibility with 11–32T, 11–34T, and 11–36T cassettes gives you room for both sporty and endurance gearing.

Technical specifications

The component’s technical designation is IRDRX400.

It is intended for a Shimano 2x10 system for gravel and cyclocross.

The maximum difference in chainring teeth is 16 teeth.

The derailleur weighs 303 g in black.

Conclusion

Shimano GRX RD-RX400 is a rear derailleur designed for more secure chain management on gravel and during fast transitions over rough surfaces. Thanks to Shadow Plus, the drivetrain feels calmer and the bike is less affected by rattling. If you’re dialing in a functional 10-speed gravel setup, it’s a reliable foundation for clean shifting.

Key features

• Gravel and cyclocross use
• Shadow Plus technology with cage lock
• Compatibility with 11–32 to 11–36 cassettes
• For Shimano 2x10 system
• Black finish

EAN: 6811100014032