Shimano GRX Shadow Plus RD-RX812 11-speed Rear Derailleur

With the GRX RD-RX812 rear derailleur by Shimano you can shift reliably off-road

With the Shimano GRX RD-RX812 rear derailleur you can shift smoothly and quietly on rough terrain. An adjustable chain stabilizer and the Shimano Shadow RD+ technology counteract chain slapping and dropping. Use this rear derailleur when riding an 11-40 or 11-42 cassette.


Are you interested in the GRX series? Then have a look at our Shimano gravel site. You will find many more products there.

Specifications:

Series:

GRX RX810

Application:

Gravel, Cyclocross, City & Touring

Gearing:

11-speed

Mount:

standard (Direct Mount compatible)

Capacity:

31-tooth

Compatibility:

Shimano Road 11-speed

Compatibility - Chains:

HG-EV 11-speed, HG-X11

Technical Information:

Derailleur Pulleys:

11-tooth

Outer Cage Material:

aluminium

Inner Cage Material:

aluminium

Other Materials:

aluminium, composite material (GFRP), steel, stainless steel

Compatibility:

1x11-speed:

Shift/Brake Lever:

ST-RX810, ST-RX600

Cassette:

CS-M8000-11, CS-M7000-11, CS-M5100-11

Chain:

CN-9000, CN-6800, CN-HG901-11, CN-HG701-11, CN-HG601-11, CN-LG500

Features:

• adjustable chain stabilisation prevents chain drops
• stabilizer with on/off switch to adapt to the terrain
• tension adapted to gravel
• silent and continuous rear derailleur on uneven terrain
• smooth and reliable shifting on mixed terrain
• painted cage plates
• derailleur pulley bearings
• 4 pivot bushings, fluorine-coated

Technology:

Shadow RD+
Shadow Plus rear derailleurs are just as low-profile as Shimano's Shadow rear derailleurs. In addition, a stabilizer with on/off switch is used to reduce chain slap and thus counteract chain drop. At the same time, this results in a quieter drive. Weight is also saved compared to other chain restraint devices.

OT-RS900
For Dura-Ace, Ultegra, 105, GRX and other 11-speed or 12-speed road and gravel rear derailleurs, Shimano has developed the special OT-RS900 cable housing. It is less stiff than the conventional OT-SP41 housing and is therefore better suited to the tight curve where the cable is routed from the frame to the rear derailleur. Thanks to OT-RS900, problems with the barrel adjuster can be prevented and the rear wheel can be removed more easily. OT-RS900 is not intended for use on the shift/brake lever side.

Models:

long:

Max. Largest Sprocket Teeth:

42-tooth

Min. Largest Sprocket Teeth:

40-tooth

Max. Smallest Sprocket Teeth:

11-tooth

Min. Smallest Sprocket Teeth:

11-tooth

Max. Chainring Difference:

0-tooth

Total Capacity:

31-tooth

Manufacturer Number:

I-RDRX812

Contents:

• 1 x Shimano GRX RD-RX812 rear derailleur
• 1 x Shimano OT-RS900 240 mm cable housing
• 1 x long nose end cap