---
product_id: 241101188
title: "Black,ERDM3100SGS Alivio Alivio M3100 Rear derailleur, 9-Speed, Shadow Design, SGS Long cage"
brand: "shimano"
price: "305.45 DT"
currency: TND
in_stock: true
category: "Shimano"
url: https://www.desertcart.tn/products/241101188-black-erdm3100sgs-alivio-alivio-m3100-rear-derailleur-9-speed-shadow
store_origin: TN
region: Tunisia
---

# SGS long cage for smooth chain tension 9-speed precision shifting Shadow RD tech for impact protection Black,ERDM3100SGS Alivio Alivio M3100 Rear derailleur, 9-Speed, Shadow Design, SGS Long cage

**Brand:** shimano
**Price:** 305.45 DT
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift into adventure mode with Shimano Alivio – where precision meets durability!

## Quick Answers

- **What is this?** Black,ERDM3100SGS Alivio Alivio M3100 Rear derailleur, 9-Speed, Shadow Design, SGS Long cage by shimano
- **How much does it cost?** 305.45 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/241101188-black-erdm3100sgs-alivio-alivio-m3100-rear-derailleur-9-speed-shadow)

## 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

- • **Lightweight & Robust:** Crafted from steel and aluminum for a perfect balance of strength and weight at just 0.2 kg.
- • **Trail-Ready Durability:** Shadow RD design minimizes damage from trail obstacles, keeping your ride smooth and worry-free.
- • **Effortless Installation:** Designed for quick setup with basic tools, so you can get back on the trail faster.
- • **Seamless 9-Speed Shifting:** HyperGlide system ensures crisp, reliable gear changes for every terrain.
- • **Optimized Chain Management:** SGS long cage maintains perfect chain tension, reducing wear and boosting drivetrain longevity.

## Overview

The Shimano Alivio M3100 Rear Derailleur is a 9-speed, Shadow RD-equipped drivetrain component engineered for trail and trekking bikes. Featuring a flat, impact-resistant design and SGS long cage for optimal chain tension, it delivers smooth, reliable shifting with HyperGlide technology. Lightweight yet durable, it’s easy to install and built to withstand rugged outdoor conditions, making it a top choice for serious cyclists seeking performance and longevity.

## Description

desertcart.com : SHIMANO Alivio RD-M3100 Rear Derailleur - 9-Speed, Long Cage | Alivio RD-M3100 9-Speed Long Cage Rear Derailleur with Shadow RD Tech : Sports & Outdoors

## Features

- 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 Drivetrain Speeds: 9 Cage Length: Long
- Chain Wrap Capacity (teeth): 45 teeth
- Rear Derailleur Mount Type: Shimano Rear Direct Mount , 10x1 Standard

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08CGYD213 |
| Best Sellers Rank | #50,940 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #16 in Rear Bike Derailleurs |
| Brand Name | SHIMANO |
| Case Material Type | Steel & Aluminum |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (718) |
| Global Trade Identification Number | 04550170621155 |
| Included Components | Bike Parts |
| Item Dimensions L x W x H | 6.69"L x 4.43"W x 3.94"H |
| Item Highlight | Alivio RD-M3100 9-Speed Long Cage Rear Derailleur with Shadow RD Tech |
| Item Type Name | Rear derailleur. |
| Item Weight | 0.2 kg |
| Manufacturer | Shimano |
| Manufacturer Part Number | ERDM3100SGS |
| Material Type | other |
| Model Number | C8C086 |
| Mount Type | Braze-On Mount |
| Number of Items | 1 |
| Number of Teeth | 36 |
| UPC | 192790621159 |
| Unit Count | 1 Count |
| Warranty Description | 2 Year Manufacturer |

## Product Details

- **Brand:** SHIMANO
- **Color:** Black
- **Item Weight:** 0.2 kg
- **Material:** other
- **Mounting Type:** Braze-On Mount

## Images

![Black,ERDM3100SGS Alivio Alivio M3100 Rear derailleur, 9-Speed, Shadow Design, SGS Long cage - Image 1](https://m.media-amazon.com/images/I/51x63EFYbSL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: sirve para 2x9 de 11-40?**
A: Trabaja bien para 3*9

**Q: Is this compatible for 8 speed?**
A: Not perfectly - the m3100 model is really meant for 9 speed

**Q: Will this replace the stx rc on a Trek 7300 8 speed?**
A: Shimano's Compatibility charts won't show this "9-speed" derailleur as compatible with 8-speed components, but it should work just fine. Shimano 8-speed shifters will work. This RD can handle larger cogs than were common in the 8-speed era, up to 36t largest cog, but assuming you have 11-32 it'll work. I have an stx rc RD on one of my bikes, and wouldn't hesitate to try this as a replacement.

**Q: Does it come with the hanger bolt?**
A: Hi - It does not.

## Frequently Bought Together

- Shimano,Black,ERDM3100SGS Alivio Alivio M3100 Rear derailleur, 9-Speed, Shadow Design, SGS Long cage
- SHIMANO Alivio SL-M3100 Alivio Shift Lever, 9-Speed, Band on, Right Hand,Black

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**Shop now:** [https://www.desertcart.tn/products/241101188-black-erdm3100sgs-alivio-alivio-m3100-rear-derailleur-9-speed-shadow](https://www.desertcart.tn/products/241101188-black-erdm3100sgs-alivio-alivio-m3100-rear-derailleur-9-speed-shadow)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-10-16*