⚙️ Precision Gravel Shifting Designed for Rough Terrain

The Shimano GRX RD-RX810 rear derailleur represents Shimano’s dedicated engineering effort to optimize 11-speed drivetrain performance specifically for gravel, adventure, and cyclocross riding. Unlike traditional road derailleurs, the RD-RX810 integrates the SHADOW RD+ clutch mechanism, which stabilizes the chain over rough, uneven terrain, reducing chain slap, noise, and potential chain drops. This clutch system can be toggled on or off to adapt to different riding conditions — clutch ON for rough trails, clutch OFF for smooth roads or time trial setups.

🚵‍♂️ Advanced Features and Design

• SHADOW RD+ Technology:
  The clutch inside the derailleur cage adds controlled resistance to the cage’s movement, maintaining consistent chain tension. This results in quieter operation and fewer dropped chains, which is critical on gravel or mixed surfaces where bike vibrations are high.

• Long Cage Design (GS):
  Supports a wide gear range, compatible with cassettes up to 11-34T, allowing riders to tackle steep climbs and variable terrain with ease.

• Robust Construction:
  The RD-RX810 uses fluoric-coated link bushings to reduce friction and wear, and sealed cartridge bearings in the guide and tension pulleys ensure smooth and durable rotation even in muddy or dusty conditions.

• Direct Mount Compatibility:
  Designed to mount directly onto compatible gravel frame hangers, offering a clean, aerodynamic setup and improved derailleur stability.

• Cable Routing & Housing:
  Included OT-RS900 cable housing (240mm) provides smooth, low-friction shifting cable path, which is especially beneficial for longer cable runs common in gravel setups.

• Weight & Material:
  Weighing approximately 255 grams, the derailleur balances lightweight design with durability suitable for off-road abuse.

🔩 Compatibility & Technical Details

• Speed: 11-speed

• Cassette Range: 11-30T to 11-34T

• Max Front Difference: 17T

• Total Capacity: 40T

• Pulley Teeth: 13T (larger pulleys reduce friction, improving efficiency and longevity)

• Mounting: Standard direct attachment compatible with GRX-specific frames

• Chain Compatibility: Designed for Shimano HG-EV and HG-X11 chains, optimized for LINKGLIDE chain systems on gravel bikes.

⚙️ Maintenance & Durability

• Clutch Adjustment: The clutch can be engaged or disengaged depending on terrain and rider preference, enabling versatility for road, gravel, or cyclocross use.

• Sealed Bearings: Ensure longer service life with less maintenance.

• Fluorine-coated bushings: Reduce friction, improving shift precision and reliability.

• Routine Care: Regular cleaning and lubrication of the pivot points and pulleys maximize drivetrain performance and durability, especially after wet or muddy rides.

📦 OEM Packing Overview

This OEM package includes the derailleur itself, the OT-RS900 black 240mm cable housing for smooth shifting cable runs, and a long nose cap to facilitate clean cable routing and protect cable ends. The packaging is basic, designed for manufacturers or bike shops but contains genuine Shimano components with full functionality.

🎯 Who Should Choose RD-RX810?

• Gravel and adventure riders who need a durable, clutch-equipped rear derailleur for rough terrain.

• Cyclocross racers seeking quiet, precise shifts without chain bounce.

• Riders using wide-range 11-speed cassettes up to 34T, needing reliable performance on mixed surfaces.

• Those wanting Shimano’s GRX-specific technology tuned for off-road conditions.