The Shimano Alivio RD-M3100 Rear Derailleur features Shadow RD technology to keep the derailleur safe from trail obstacles.Super low profile Shadow RD technology
| Largest Cog | 36 |
| Rear Der/Shifter Compatibility | Shimano Mountain |
| Rear Derailleur Mount Type | 10x1 Standard |
| Drivetrain Speeds | 9 |
| Chain Wrap Capacity (teeth) | 45 |
| Cage Length | Long |
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