Understanding Di2 derailleur specifications
Shimano front derailleur and rear derailleur specifications... what do they mean, really? This page explains all of them, and why they matter.
Short Cage Shadow Rear Derailleur
Ultegra RD-R8050-SS
The Ultegra R8050 SS short cage rear derailleur is compact and designed to protect the shifting operation in the event of a crash.
It features ergonomic shifting without stress, supports synchronized shift and has a low profile design.
The short cage version supports 11-25T to 11-30T.
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Installation by Free To Cycle
Youtube mechanic Free To Cycle has a pretty good RD-R8050 Installation video on his channel.
Alternatively, head over to the installation guides section of the site for all of my installation guides.
Specifications
- Model code: RD-R8050-SS
- Series: Ultegra (R8050)
- Weight: 240g
- Speeds: 11
- SD50 ports: 1
- Max front difference: 16T
- Total capacity: 33T
- Low sprocket max: 30T
- Low sprocket min: 25T
- Top sprocket min: 11T
- Top sprocket max: 14T
- Pulley teeth: 11
- RD type: Shadow RD
- Clutch: No
Related components
View all componentsRelated pages
Micro-adjust your 10-speed and 11-speed road bike Di2 rear derailleur
Indexing, trimming, or fine-tuning Di2 rear derailleurs is done through micro-adjustment. Read how to set up your Di2 rear derailleur perfectly and ride without those grinding noises.
Installation Guide: 10-speed and 11-speed Di2 road Rear Derailleur
Bought a new Di2 rear derailleur and need some help installing it? Read how to install the RD-R8050 / RD-R9150 / RD-6870 / RD-9070 Di2 rear derailleurs.
Synchronized Shifting - the complete guide
Synchronized Shifting - what is it exactly? What does it do and how can you set it up? This page will guide you through the process of setting up synchro shift.
Manuals & other documents
Firmware updates
Below is an overview of all known firmware updates for this component. The changelog texts are Shimano's, and quite often they're a bit cryptic - sorry!
3.3.0
Added a function to adjust the correct rear derailleur position under the maintenance tab.
3.2.1
-Added interchangeability between SHIMANO STEPS with Road components.- Adopted models （RD-R8050-SS/RD-R8050-GS/RD-RX805/RD-RX815）
3.1.3
・Adopted for Gravel/Adventure Road Bike rear derailleur, RD-RX805・Bug fixing
3.1.1
・ Improved shifting performance・ Adopted to GS cage
3.0.3
Adapted for ULTEGRA Di2 (R8050 series)