| CAGE LENGTH | One-Spec |
| TOTAL CAPACITY | 39T |
| MAX FRONT DIFFERENCE | 16 |
| COLOR | SERIES COLOR |
| AVERAGE WEIGHT | 262g |
| MOUNT | Direct attachment (conventional) |
| NUMBER OF PULLEY TEETH | 11 |
| SERIES | Ultegra |
| GENERATION | R8100 |
| MAX LOW SPROCKET | 34T |
| MIN LOW SPROCKET | 28T |
| REAR SPEEDS | 12 |
bicycle tool precision-Shimano Ultegra Di2 RD-R8150 12-Speed Rear Derailleur
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