Shimano XTR Di2 RD-M9050 11-speed Shadow Plus Rear Derailleur

The XTR Di2 RD-M9050 rear derailleur by Shimano - powerful gear changes in every situation

The Shimano XTR Di2 RD-M9050 rear derailleur provides high-precision, super fast and powerful shifting easily and at any time with just a push of a button. In bringing this new technology to market, Shimano presents a quintessential element of electronic shifting for mountain bikes. Like its mechanical counterpart, the Shimano RD-M9050 is equipped with Shadow-Plus technology for greater chain stability, allowing for fine adjustments between maximum safety and minimal shifting force. A significant advancement is demonstrated in its Synchro Shift function, which allows the front derailleur to move automatically according to the position of the rear derailleur. The XTR Di2 rear derailleur is made of aluminium and carbon and is available in two versions. The shorter version (GS) can only be used with 1x11-speed and 2x11-speed drivetrains (11-46 respective to 11-42 cassette), and the longer version (SGS) was designed for 3x11-speed drivetrains (11-40 cassette).

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:

XTR Di2 M9050

Application:

Cross Country, All Mountain, Enduro

Gearing:

11-speed

Mount:

standard (Direct Mount compatible)

Capacity:

35 tooth (short), 41 tooth (long)

Compatibility:

Shimano MTB 11-speed

Compatibility - Chains:

HG-X11

Technical Information:

Derailleur Pulleys:

11-tooth

Outer Cage Material:

carbon (CFRP)

Inner Cage Material:

Aluminium

Other Materials:

stainless steel, aluminium, carbon (CFRP)

Compatibility:

Power Cable:

EW-SD50 (1 x connection)

Shifter:

SW-M9050, SW-M8050

Cassette:

• short / GS: 1x11-speed: CS-M9001 (11-40 T), CS-M8000 (11-40, 11-42, 11-46 T), CS-M7000-11 (11-40, 11-42, 11-46 T), CS-M5100-11 (11-42 T only)
• short / GS: 2x11-speed: CS-M8000, CS-M7000-11, CS-M5100-11 (only 11-42 T)
• long / SGS: 1x11-speed: CS-M9001 (11-40 T), CS-M8000 (11-40, 11-42, 11-46 T), CS-M7000-11 (11-40, 11-42, 11-46 T), CS-M5100-11 (11-42 T only)
• long / SGS: 2x11-speed: CS-M8000, CS-M7000-11, CS-M5100-11 (only 11-42 T)
• long / SGS: 3x11-speed: CS-M9001, CS-M8000, CS-M7000-11 (only 11-40 T)

Chain:

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

Features:

• shift motor responds instantly to rider input
• seamless gear changes: accurate chain position in each gear, consistent shifting in each gear combination
• Shimano Synchronized Shift: system communication with the front derailleur
• works reliably under all conditions: electrical impulse transmission guarantees stable performance
• Di2 system restricts possible incorrect chainlines and chain drops
• cage plates painted/anodised
• 4 pivot bushings, fluorine-coated
• derailleur pulley bearings sealed

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:

Cage Length:

GS

Max. Largest Sprocket Teeth:

42 with 2x11-speed, 46 with 1x11-speed

Min. Largest Sprocket Teeth:

40-tooth

Max. Smallest Sprocket Teeth:

11-tooth

Min. Smallest Sprocket Teeth:

11-tooth

Max. Chainring Difference:

10-tooth

Total Capacity:

35-tooth

Manufacturer Number:

I-RDM9050GS

long:

Cage Length:

SGS

Max. Largest Sprocket Teeth:

40 with 3x11-speed, 42 with 2x11-speed, 46 with 1x11-speed

Min. Largest Sprocket Teeth:

40-tooth

Max. Smallest Sprocket Teeth:

11-tooth

Min. Smallest Sprocket Teeth:

11-tooth

Max. Chainring Difference:

18-tooth

Total Capacity:

41-tooth

Manufacturer Number:

I-RDM9050SGS

Contents:

• 1 x Shimano XTR Di2 RD-M9050 rear derailleur