Shimano Rdrx400 Grx Derailleur Rear 2x10
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Shimano GRX RD-RX400 Rear Derailleur 2x10-Speed
What Is It?
The Shimano GRX RD-RX400 is a 10-speed rear derailleur designed for gravel cycling and mixed-terrain riding. Featuring Shimano SHADOW RD+ chain stabilisation technology, it helps reduce chain slap and chain drops on rough surfaces while delivering smooth, reliable shifting. It is designed for use with compatible Shimano 2x10-speed GRX drivetrain systems.
Key Features
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10-speed drivetrain compatibility: Designed for Shimano GRX 2x10-speed setups.
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SHADOW RD+ technology: Integrated chain stabiliser helps reduce chain movement and chain drops.
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On/off stabiliser switch: Allows the chain stabiliser to be adjusted for different riding conditions.
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Gravel-specific design: Optimised for dependable shifting on mixed and uneven terrain.
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Wide gear range: Supports compatible cassettes with up to a 36-tooth largest sprocket.
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Precise shifting: Helps deliver consistent gear changes across road and gravel surfaces.
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Durable construction: Built for the demands of regular gravel and endurance riding.
Specifications
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Brand: Shimano
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Series: GRX
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Model: RD-RX400
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Product type: Rear derailleur
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Rear speeds: 10-speed
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Drivetrain configuration: 2x10-speed
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Compatible chain: Shimano HG-X 10-speed
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Maximum front chainring difference: 16T
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Total capacity: 41T
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Maximum low sprocket: 36T
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Minimum low sprocket: 32T
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Maximum top sprocket: 11T
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Minimum top sprocket: 11T
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Technology: Shimano SHADOW RD+
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Chain stabiliser: Adjustable, with on/off switch
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Mounting: Conventional direct attachment or compatible direct-mount configuration
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Average weight: 303g.
Benefits
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Reduces chain slap and improves drivetrain stability on rough terrain.
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Provides reliable shifting for mixed-surface adventures.
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Supports a wide range of gears for climbing and faster riding.
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Helps maintain a quieter drivetrain on gravel roads and trails.
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Offers dependable performance for long-distance cycling.
Best Suited For
Gravel cyclists, endurance riders and bikepackers using compatible Shimano GRX 2x10-speed drivetrains who want reliable shifting and improved chain stability on varied terrain.
