GRX RD-RX812-R 11-Speed Rear Derailleur is purpose-built for cyclists who demand reliable shifting across gravel, dirt, and rough roads.
It combines stable performance with smooth operation, giving you the confidence to ride further without distraction.
The derailleur features an adjustable chain stabiliser that keeps the drivetrain quiet and prevents chain drops on rugged terrain. When the road smooths out, the stabiliser can be disengaged for lighter, more efficient shifting. Designed around gravel-specific riding, it is compatible with 11-speed MTB cassettes up to a 42T low sprocket, offering wide-range gearing for steep climbs and varied routes.
Key Features
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Integrated chain stabiliser reduces noise and prevents chain slapping
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ON/OFF stabiliser switch adapts performance to terrain
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Gravel-specific clutch tension for mixed-surface riding
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Consistent and reliable shifting across rough conditions
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Compatible with road DUAL CONTROL LEVER systems
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Silent operation with secure chain retention
Technical Specifications
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Speed: 11-speed
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Top sprocket: Max. 11T / Min. 11T
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Low sprocket: Max. 42T / Min. 40T
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Total capacity: 31T
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Model: RD-RX812-R
