---
product_id: 434505662
title: "Shimano Deore Rd-M5120 Rear Derailleur"
brand: "shimano"
price: "R$820"
currency: BRL
in_stock: true
reviews_count: 13
category: "Shimano"
url: https://www.desertcart.com.br/products/434505662-shimano-deore-rd-m5120-rear-derailleur
store_origin: BR
region: Brazil
---

# Chain stabilizer tech for quiet ride 41t max capacity SHIMANO SHADOW RD+ low profile Shimano Deore Rd-M5120 Rear Derailleur

**Brand:** shimano
**Price:** R$820
**Availability:** ✅ In Stock

## Summary

> 🚵‍♂️ Shift Like a Pro, Ride Like You Own the Trail!

## Quick Answers

- **What is this?** Shimano Deore Rd-M5120 Rear Derailleur by shimano
- **How much does it cost?** R$820 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/434505662-shimano-deore-rd-m5120-rear-derailleur)

## 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

- • **Rock-Smart Design:** Low-profile SHIMANO SHADOW RD+ keeps your derailleur safe from trail hazards.
- • **Chain Drop? Not Here!:** Advanced chain stabilizing tech slashes chain drops and drivetrain noise.
- • **Lightweight Durability:** Aluminum build balances ruggedness with minimal weight for all-day trail dominance.
- • **Versatile Compatibility:** Works seamlessly with HG-X11 11-speed and HG-X 10-speed cassettes up to 46t.
- • **Precision Shifting Mastery:** Smooth, consistent gear changes across 10-11 speed setups for flawless MTB performance.

## Overview

The Shimano Deore RD-M5120 Rear Derailleur features a durable aluminum construction with a 41t capacity and supports 10-11 speed drivetrains. Its SHIMANO SHADOW RD+ low-profile design protects against trail damage while chain stabilizing technology ensures quiet, reliable shifting. Compatible with HG-X11 and HG-X cassettes up to 46t, it delivers smooth, precise gear changes ideal for serious mountain bikers seeking performance and durability.

## Description

Utilizing the SHIMANO SHADOW RD+ design, the SHIMANO DEORE M5120 rear derailleur delivers consistent MTB shifting performance over rough terrain. The low profile design avoids damage from rocks whiles SHIMANO's chain stabilizing technology reduces chain drop and makes for a quiet drivetrain in all gear positions.

Review: Great mate to Shimano SL-BS77 Dura Ace Double/Triple Bar End Shifters - My recumbent requires a long cage shifter due to its long & convoluted chain path. This is a perfect replacement for the Shimano Dura Ace RD-7700, and a perfect mare to Shimano SL-BS77 Dura Ace Double/Triple Bar End Shifters. Simple to install, and very smooth shifting.
Review: Perfect for my restoration project - I put this on my vintage GT mountain bike as part of an updated 1x drivetrain. Works great! It shifts perfectly with very easy set up. Don’t make the mistake I did… I first tried to pair it with a 11-48 cassette but quickly realized it wouldn’t work, looked closer at the description, and saw that it maxes out with a 46t gear. No big deal though. Got an appropriate cassette and it all came together perfectly.

## Features

- Material: aluminum
- Capacity: 41t
- Cassette Range: [2 x 11/10] 42t, [1 x 10] 46t
- Gearing: [long] 2 x 11, 2 x 10, 1 x 10
- Compatibility: HG-X11 11-speed, HG-X 10-speed

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B089KDV5C7 |
| Best Sellers Rank | #57,824 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #13 in Rear Bike Derailleurs |
| Brand Name | SHIMANO |
| Customer Reviews | 4.6 4.6 out of 5 stars (206) |
| Date First Available | August 17, 2020 |
| Included Components | Rear Derailleur |
| Item Dimensions LxWxH | 8 x 5 x 4 inches |
| Item Package Dimensions L x W x H | 7.76 x 4.92 x 3.7 inches |
| Manufacturer | Shimano |
| Model Name | Rear Derailleur |
| Number of Items | 1 |
| Package Weight | 0.44 Kilograms |
| Part Number | ERDM5120SGS |
| Product Dimensions | 8"L x 5"W x 4"H |
| Size | 10/11 Speed |
| Sport Type | Cycling |
| Style | Rear Derailleur |
| Suggested Users | mens |
| UPC | 192790618548 |
| Warranty Description | Limited Warranty |

## Product Details

- **Brand:** SHIMANO
- **Color:** Black
- **Item Weight:** 203 Grams
- **Material:** Aluminum
- **Mounting Type:** Braze-On Mount

## Images

![Shimano Deore Rd-M5120 Rear Derailleur - Image 1](https://m.media-amazon.com/images/I/61a1EK2nXzL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: I have an older mtn bike with a 10speed deore. Can I run this derailleur with my current shimano 10sp shifter? The shimano deore sl-m610?**
A: I believe that Shimano's 10 spd mtn shifters are pretty much the same, regardless of the year. I'm using a 10 spd Zee shifter with it and it works fine.

**Q: will this work on a 10 s road bike with 11x42 (rear)?**
A: I honestly don't know, but it is designed for use with 42-46T cassettes as long as the shifter has the same pull ratio, theoretically it will work with both 10- and 11-speed shifters. Google says a mtb derailleur should work.

**Q: Can i use this with my 9 speed shifter and 9 speed cassette?**
A: Not out of the box. When Shimano went to 10 speed, they altered the shifter/derailleur pull. JTek may make a pulley that will allow you to do so, but you'll need to visit their website and pore through the compatibility charts there. If you find one, then you'll need to find a retailer that carries it. Honestly, it would be easier just to find a 9 speed derailleur unless you already have this derailleur and need to find a solution to get it to work.

**Q: Will this fit a 11t-46t 10 speed cassette?**
A: Yes it will. I just did mine

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great mate to Shimano SL-BS77 Dura Ace Double/Triple Bar End Shifters
*by T***T on September 6, 2025*

My recumbent requires a long cage shifter due to its long & convoluted chain path. This is a perfect replacement for the Shimano Dura Ace RD-7700, and a perfect mare to Shimano SL-BS77 Dura Ace Double/Triple Bar End Shifters. Simple to install, and very smooth shifting.

### ⭐⭐⭐⭐⭐ Perfect for my restoration project
*by C***S on July 13, 2024*

I put this on my vintage GT mountain bike as part of an updated 1x drivetrain. Works great! It shifts perfectly with very easy set up. Don’t make the mistake I did… I first tried to pair it with a 11-48 cassette but quickly realized it wouldn’t work, looked closer at the description, and saw that it maxes out with a 46t gear. No big deal though. Got an appropriate cassette and it all came together perfectly.

### ⭐⭐⭐⭐⭐ Shifts great
*by J***E on June 4, 2025*

Works great as long as you install the cable correctly. The end of the cable does a U-turn around the clamping screw. If you flip the cable around so that the U faces the wrong way it won't shift correctly.

## Frequently Bought Together

- Shimano Deore Rd-M5120 Rear Derailleur
- SHIMANO SL-M6000 Deore Shift Lever, Band-on, 10-Speed, Right Hand
- Shimano Deore CS-M4100-10 Cassette - 10-Speed, 11-46t, Silver

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-17*