# 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 Servo mechanism enables the rear derailleur to move in an optimum path
-   Versatile performance and wide compatibility
-   SGS Long cage
    
    Rear Der/Shifter Compatibility
    
    Shimano Mountain
    
    Rear Derailleur Mount Type
    
    10x1 Standard
    
    Drivetrain Speeds
    
    7
    
    Chain Wrap Capacity (teeth)
    
    45
    
    Cage Length
    
    Long
    
    Color
    
    Black
    
    keyword search
    
    3020

## Details

- **Price:** 41.0 USD
- **Vendor:** Gio's Outdoors
- **Type:** Rear Derailleurs
- **Tags:** Gio's Outdoors, Shopify Collective

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 41.00 USD | In stock |

## Images

- Shimano Acera RD-M3020-SGS Rear Derailleur - 7/8 Speed Long Cage Black

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> Source: [Smart supply deals](https://smartsupplydeals.com/products/shimano-acera-rd-m3020-sgs-rear-derailleur-7-8-speed-long-cage-black)
> Updated: 2026-07-22