Shimano Ultegra Di2 Shadow RD-R8050 11-speed Rear Derailleur

The Ultegra Di2 RD-R8050 Rear Derailleur by Shimano - Always a Smooth Ride

The electronic Shimano Ultegra Di2 RD-R8050 Rear Derailleur is characterised by its particularly low profile, the so-called Shadow Design, and boasts not only a compact appearance but also greater stability and a lower risk of damage. It guarantees quieter, safer shifting under all conditions. Similar to Di2, the shifters operate seamlessly with very little effort. The Synchro-Shift function allows the front derailleur to perform automatic adjustment maneuvers. The Semi-Synchro-Shift function can also be used. The rear is shifted correspondingly when the front derailleur is engaged. The new direct mounting option is also perfectly suited for frames with thru-axle dropouts. Constructed mostly out of Aluminum, the Ultegra Di2 rear derailleur is available in two versions: one with a short cage (SS type) for cassettes with a 11-30 gradation, the other with a longer cage (GS type) for cassettes with a 11-34 gradation. With the RD-R8050, you'll look forward to steep climbs and a smooth ride.

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:

Ultegra Di2 R8050

Application:

Road, Cyclocross

Gearing:

11-speed

Mount:

standard (Direct Mount compatible)

Capacity:

33 tooth (short), 37 tooth (long)

Compatibility:

Shimano Road 11-speed

Technical Information:

Derailleur Pulleys:

11-tooth

Outer Cage Material:

Aluminium

Inner Cage Material:

Aluminium

Other Materials:

aluminium, composite material (GFRP), steel

Compatibility:

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-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:

• low profile Shimano Shadow RD design increases stability and reduces susceptibility to defects, provides compact appearance
• two cage lengths for a wide range of gears
• Shimano Synchro Shift
• 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 rear derailleurs from Shimano have a very flat profile, allowing for a more aggressive riding style by minimising the risk of getting stuck on obstacles. In addition, the single preload ensures that the rear derailleur does not hit the chain stay even on very uneven ground. All of this contributes to a quiet, clean-operating gearshift.

Models:

short:

Cage Length:

SS

Max. Largest Sprocket Teeth:

30-tooth

Min. Largest Sprocket Teeth:

25-tooth

Max. Smallest Sprocket Teeth:

14-tooth

Min. Smallest Sprocket Teeth:

11-tooth

Max. Chainring Difference:

16-tooth

Total Capacity:

33-tooth

Manufacturer Number:

I-RDR8050SS

long:

Cage Length:

GS

Max. Largest Sprocket Teeth:

34-tooth

Min. Largest Sprocket Teeth:

28-tooth

Max. Smallest Sprocket Teeth:

12-tooth

Min. Smallest Sprocket Teeth:

11-tooth

Max. Chainring Difference:

16-tooth

Total Capacity:

37-tooth

Manufacturer Number:

I-RDR8050GS

Contents:

• 1 x Shimano Ultegra Di2 RD-R8050 rear derailleur