
- Exact actuation shifting
- Aeroglide pulleys with BlackBox hybrid ceramic bearings.
- Max tooth 28T short cage/32T medium cage (WiFli)
- 145g
- SRAM Model ID: RD-RED-B1
Attributes
| Minimum Cog | 11T |
| Primary Color | Silver |
| RD Capacity | 31T |
| RD Weight | 145g |
| Speed | 10 |