Official Specifications - FD-R8050
| Series | ULTEGRA |
| Model no. | FD-R8050 |
| Color | Series color |
| Front speeds | 2 |
| Rear speeds | 11 |
| Compatible chain | LINKGLIDE, HG 11-speed |
| Down swing | ✔ |
| Brazed-on | ✔ |
| Chain line (mm) | 43.5 |
| Chainstay angle (deg.) | 61-66 |
| Top gear teeth | 46-53T |
| Total capacity | 16T, 17T *1 |
| Link bushings | 2 |
| Rear clamp band, base bracket Material | Aluminum |
| Rear clamp band, base bracket Finish | Painted |
| Outer link Material | CFRP |
| Outer link Finish | Painted |
| Inner link Material | Steel |
| Inner link Finish | Plated |
| Chain guide Material | Steel |
| Chain guide Finish | Chrome plated |
| Firmware update by E-TUBE PROJECT | ✔ |
| SD50 port (pcs) | 1 |
| SD300 port (pcs) | 0 |
| SD50 connector (pcs) | 0 |
| SD300 connector (pcs) | 0 |
| Average weight (g) (band type: L size, direct type w/ screw) | 132 |
| Note | *1 Use with E-BIKE |