- 2:1 actuation ratio, compatible with most Shimano 3x7/8sp drivetrains
- Aluminum and steel construction with 11-tooth pulleys, barrel adjuster
| Model | M57 |
| Mount | 10x1 Standard |
| Speed | 7/8 |
| Cage | Long |
| Retention | No |
| Min/Max | 11/34t |
| Capacity | 43t |
| Weight | 355g |
| Color | Black |