| Model | RD-M8100-GS |
| Reference supplier | IRDM8100GS |
| Practical | VTT |
| Derailleur mount | Classique |
| Yoke | Longue |
| Number of compatible speeds | 12, 1x12 |
| Weight in grams | 286 |
| Technology | Shadow RD+ |
| Détails | |
| Chain compatibility | HG 12 vitesses |
| Variator rollers | 13 dents |
| Small minimum sprocket | 10 dents |
| Large maximum sprocket | 45 dents |
| Total capacity | 35 dents |
Deore/XT M8100 rear derailleur
Gears: 12
Total capacity: 35 teeth
Maximum sprocket: 45 teeth
Minimum sprocket: 10 teeth
Technology: Shadow RD+ (Chain Retention System)
Weight: 284g