Shimano GRX Di2 Shadow Plus RD-RX815 11-speed Rear Derailleur

Shimano GRX Di2 RD-RX815 rear derailleur - reliable shifting on rough terrain

With the Shimano GRX Di2 RD-RX815 electronic rear derailleur you shift smoothly and quietly on rough terrain. An adjustable chain stabilizer and the Shadow RD+ technology, protect you from chain slaps and drops. RD-RX815 is not only compatible with GRX shift/brake levers, but also with all current Shimano 11-speed Road Di2 Dual Control STIs. Use this rear derailleur when riding an 11-30 or 11-34 cassette.

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

Information regarding the return of batteries and electrical equipment:

Information on the return and disposal of batteries and electrical equipment can be found here.

Specifications:

Series:

GRX Di2 RX815

Application:

Gravel, Cyclocross, City & Touring

Gearing:

11-speed

Mount:

standard (Direct Mount compatible)

Capacity:

38-tooth

Compatibility:

Shimano Road 11-speed

Technical Information:

Derailleur Pulleys:

13 tooth (bottom, tension pulley), 11 tooth (top, idler pulley)

Outer Cage Material:

Aluminium

Inner Cage Material:

Aluminium

Other Materials:

aluminium, composite material (GFRP)

Compatibility:

2x11-speed:

Power Cable:

EW-SD50 (1 x connection)

Shift/Brake Lever:

ST-R9150, ST-R9160, ST-R9170, ST-R9180, ST-9070, ST-R8050, ST-R8060, ST-R8070, ST-9071, ST-6870, ST-6871, ST-RX815, ST-R785

Cassette:

CS-R9100, 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:

• quiet and smooth shifts on rough terrain
• Gravel-specific tension
• damping can be switched on and off depending on terrain
• painted cage plates
• derailleur pulley bearings
• 4 pivot bushings, fluorine-coated
• E-Tube project ensures firmware updates

Technology:

Digital Integrated Intelligence (Di2)
Di2 systems are the electronic shifting systems from Shimano. They are based on the SEIS, the Shimano Electronic Intelligent System, which takes over the index shifting function from the mechanical components, only via power cables or radio signals and not via a Bowden cable. Shifting is done by simply pressing a button. This has the advantage that no great effort is required, your concentration on the ride is not disturbed and operation is easy even with cold hands. In addition, the electronic gear changes are very fast and highly precise. There is also no risk of a defective circuit due to dirty cables or other problems. You can adjust individual settings via the E-Tube Project, such as adjusting the shifting speed, the number of shifting operations per button press or the Synchro or Semi-Synchro shifting function. Shimano offers an app for this purpose. Gear maintenance and firmware updates are also done via E-Tube, with the bike connected to a PC running the appropriate E-Tube software for more extensive workshop work.

Shimano Synchronized Shift
Shimano's synchronised shifting function is a shifting mode that automatically matches the Di2 rear derailleur and Di2 front derailleur. It is activated either via the E-Tube platform or via the rear derailleurs with a function button. Synchro Shift means that the front derailleur automatically selects a suitable gear depending on the position of the rear derailleur, while Semi-Synchro Shift means that a suitable rear derailleur position is automatically set when you operate the front derailleur. This gives you the advantage that you only have to concentrate on one side of the shifting process and are not thrown off-rhythm by sudden unfavourable changes to the gear ratio.

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.

Models:

short:

Max. Largest Sprocket Teeth:

34-tooth

Min. Largest Sprocket Teeth:

30-tooth

Max. Smallest Sprocket Teeth:

11-tooth

Min. Smallest Sprocket Teeth:

11-tooth

Max. Chainring Difference:

17-tooth

Total Capacity:

38-tooth

Manufacturer Number:

I-RDRX815

Contents:

• 1 x Shimano GRX Di2 RD-RX815 rear derailleur