| Model | UTG R81 |
| Type | Extérieur |
| Denture plateau | 48 dents |
| Entraxe BCD (Ø fixation en mm) | 110 |
| Nombre de branches | 4, asymétriques |
| Number of compatible speeds | 12 |
| Compatible | Shimano® Ultegra 8100 |
| Technology | CNC / Total Traitement Anodisé noir |
| Main colour | Black |
| Matter | Aluminium 7075 T6 |
| Weight in grams | 134 |