---
product_id: 476106412
title: "Acera RD-M3020-SGS Rear Derailleur - 7/8 Speed, Long Cage, Black"
brand: "shimano"
price: "64907CFA"
currency: XOF
in_stock: true
category: "Shimano"
url: https://www.desertcart.sn/products/476106412-acera-rd-m3020-sgs-rear-derailleur-7-8-speed-long
store_origin: SN
region: Senegal
---

# SGS Long Cage, max 45T capacity Double Servo tech for precision 7/8 speed drivetrain compatibility Acera RD-M3020-SGS Rear Derailleur - 7/8 Speed, Long Cage, Black

**Brand:** shimano
**Price:** 64907CFA
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift into the future of smooth rides — don’t get left behind!

## Quick Answers

- **What is this?** Acera RD-M3020-SGS Rear Derailleur - 7/8 Speed, Long Cage, Black by shimano
- **How much does it cost?** 64907CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/476106412-acera-rd-m3020-sgs-rear-derailleur-7-8-speed-long)

## Best For

- shimano enthusiasts

## Why This Product

- Trusted shimano brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Extended Gear Range:** SGS Long Cage design handles up to 45 teeth, perfect for tackling steep climbs and varied trails.
- • **Lightweight Durability:** Crafted from robust aluminum, balancing strength with minimal weight (0.39 kg) for peak performance.
- • **Trusted Shimano Quality:** Backed by a 4.7-star rating and Shimano’s legacy, this derailleur is a pro-level upgrade you can rely on.
- • **Universal Compatibility:** Seamlessly fits 7 and 8-speed drivetrains, making upgrades effortless and versatile.
- • **Precision Shifting Mastery:** Double Servo mechanism ensures ultra-smooth, pinpoint gear changes on any terrain.

## Overview

The Shimano Acera RD-M3020-SGS Rear Derailleur features advanced Double Servo technology for precise shifting, a long cage design supporting up to 45 teeth for versatile terrain handling, and compatibility with 7 and 8-speed drivetrains. Made from durable aluminum and weighing just 0.39 kg, it offers reliable performance backed by Shimano’s trusted engineering and high customer ratings.

## Description

The Shimano Acera RD-M3020 rear shift features Double Servo technology for smooth and precise changes and helps you walk on challenging terrain with less disruption. Dual servo mechanism allows the rear shift to move in an ideal path. Versatile performance and wide compatibility. SGS Long Cage

## Features

- Double Servo mechanism enables the rear derailleur to move in an optimum path
- Versatile performance and wide compatibility
- SGS Long cage
- Chain Wrap Capacity (teeth): 45
- Drivetrain Speeds: 7,8

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BGFBSYQ3 |
| Best Sellers Rank | #104,848 in Sporting Goods ( See Top 100 in Sporting Goods ) #128 in Bike Shifters & Parts |
| Brand Name | SHIMANO |
| Case Material Type | Aluminum |
| Color | black / black |
| Customer Reviews | 4.7 4.7 out of 5 stars (182) |
| Included Components | Rear Derailleur |
| Item Weight | 0.39 Kilograms |
| Manufacturer | SHIMANO |
| Manufacturer Part Number | ERDM30208SGSL |
| Material Type | Aluminum |
| Model Number | ERDM30208SGSL |
| Mount Type | Braze-On Mount |
| Number of Teeth | 45 |
| UPC | 192790897738 |

## Product Details

- **Brand:** SHIMANO
- **Colour:** black / black
- **Item weight:** 0.39 Kilograms
- **Material:** Aluminum
- **Mounting type:** Braze-On Mount

## Images

![Acera RD-M3020-SGS Rear Derailleur - 7/8 Speed, Long Cage, Black - Image 1](https://m.media-amazon.com/images/I/61LquuwOcdL.jpg)

## Questions & Answers

**Q: Will this replace stx rc?**
A: Yes it will as long as your low sprocket on your cassette is as least a 30t.  There are cheaper Shimano derailleurs that will also work.  What makes this one special is it can be used on a 1x setup with a 11-40T cassette.

**Q: Will this replace an sis megarange?**
A: A highly qualified "Yes". Be prepared to become a self-taught expert in bicycle derailleurs in the process. Expect to discover that you need other parts, such as a hanger-adapter. You will almost certainly need to replace your shifter cable and housing, as the cable entry is different, necessitating rerouting, and hence a different length cable and housing.

## Frequently Bought Together

- Shimano Acera RD-M3020-SGS Rear Derailleur - 7/8 Speed, Long Cage, Black
- KMC Chain 8SP X8-Silver/Grey - X8.93
- SHIMANO Unisex Cshg4008140 CS HG400 8 Speed Cassette 11 40T, Silver, 40 Teeth UK

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.sn/products/476106412-acera-rd-m3020-sgs-rear-derailleur-7-8-speed-long](https://www.desertcart.sn/products/476106412-acera-rd-m3020-sgs-rear-derailleur-7-8-speed-long)

---

*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-06-23*