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Shimano Acera RD-M3020-SGS Rear Derailleur - 7/8 Speed Long Cage Black. The Shimano Acera RD-M3020 rear derailleur features Double Servo technology to provide smooth precise shifting and helps you ride challenging terrain with fewer interruptions.Double Se
Shimano Acera RD-M3020-SGS Rear Derailleur – 7/8 Speed Long Cage Black. The Shimano Acera RD-M3020 rear derailleur features Double Servo technology to provide smooth precise shifting and helps you ride challenging terrain with fewer interruptions.
| Color | Black |
| Rear Der/Shifter Compatibility | Shimano Mountain |
| Rear Derailleur Mount Type | 10×1 Standard |
| Drivetrain Speeds | 8 |
| Drivetrain Speeds | 7 |
| Chain Wrap Capacity (teeth) | 45 |
| keyword search | 3020 |
| Cage Length | Long |
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