Shimano Ultegra RX RD-RX800 11-speed Shadow Plus Rear Derailleur

The Ultegra RX RD-RX800 Rear Derailleur by Shimano - Friction damping on a Road rear derailleur

The Shimano Ultegra RX RD-RX800 rear derailleur is designed for road bikes, but features Shadow+ technology previously reserved for MTBs. In the process, a stabiliser mechanism that can be switched on and off ensures that friction is dampened, which significantly reduces the risk of chain slamming and dropping on uneven, non-asphalted ground. This makes the RD-RX800 perfect for cyclocross, gravel and adventure riders who demand a high level of safety in addition to the typical Shimano shifting precision. With its aluminium cages of the longer GS type, the Ultegra RX rear derailleur is suitable for 11-speed cassettes from 11-28 to 11-34 teeth. A direct mount option is also available.

Specifications:

Series:

Ultegra RX

Application:

Cyclocross, Gravel, Road

Gearing:

11-speed

Mount:

standard (Direct Mount compatible)

Capacity:

39-tooth

Compatibility:

Shimano Road 11-speed

Compatibility - Chains:

HG-X11

Technical Information:

Derailleur Pulleys:

11-tooth

Outer Cage Material:

aluminium

Inner Cage Material:

aluminium

Other Materials:

aluminium, composite material (GFRP), stainless steel

Compatibility:

Shifter:

ST-R9100, ST-R9120, ST-9001, ST-9000, SL-BSR1, ST-R8000, ST-R8020, ST-R8025, ST-6800, ST-R7000, ST-R7020, ST-R7025, ST-5800, SL-RS700, ST-RS685, ST-RS505, ST-U5060, SL-U5000, ST-RX810, ST-RX600

Cassette:

CS-R9100, CS-9000, CS-6800, CS-5800, CS-R8000, CS-HG800-11, CS-R7000, CS-HG700-11

Chain:

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

Features:

• chain stabilizer mechanism (Shimano Shadow RD+) from the mountain bike sector
• on/off switch
• 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:

Cage Length:

GS

Max. Largest Sprocket Teeth:

34-tooth

Min. Largest Sprocket Teeth:

28-tooth

Max. Smallest Sprocket Teeth:

11-tooth

Min. Smallest Sprocket Teeth:

11-tooth

Max. Chainring Difference:

16-tooth

Total Capacity:

39-tooth

Manufacturer Number:

I-RDRX800GS

Contents:

• 1 x Shimano Ultegra RX RD-RX800 rear derailleur
• 1 x Shimano OT-RS900 240 mm cable housing
• 1 x long nose end cap