---
product_id: 434505662
title: "Shimano Deore Rd-M5120 Rear Derailleur"
brand: "shimano"
price: "₨35772"
currency: LKR
in_stock: true
category: "Shimano"
url: https://www.desertcart.lk/products/434505662-shimano-deore-rd-m5120-rear-derailleur
store_origin: LK
region: Sri Lanka
---

# 41t max capacity Aluminum durability SHADOW RD+ low profile Shimano Deore Rd-M5120 Rear Derailleur

**Brand:** shimano
**Price:** ₨35772
**Availability:** ✅ In Stock

## Summary

> 🚵‍♂️ Shift Like a Pro, Conquer Every Trail

## Quick Answers

- **What is this?** Shimano Deore Rd-M5120 Rear Derailleur by shimano
- **How much does it cost?** ₨35772 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/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 SHADOW RD+ keeps your derailleur safe from trail hazards.
- • **Precision Shifting:** Smooth, consistent gear changes across 10-11 speed cassettes for ultimate control.
- • **Chain Stability Tech:** Advanced chain stabilizer reduces drops and drivetrain noise—ride quietly, ride confidently.
- • **Lightweight Strength:** Durable aluminum build at just 203g balances toughness with nimble performance.
- • **Wide Gear Compatibility:** Supports 2x11, 2x10, and 1x10 setups with up to 46t cassette range for versatile trail mastery.

## Overview

The Shimano Deore RD-M5120 Rear Derailleur features a rugged aluminum construction and SHIMANO's SHADOW RD+ low-profile design to protect against trail damage. It supports a wide gear range (up to 46t cassette) compatible with 10 and 11-speed drivetrains, delivering smooth, quiet, and reliable shifting performance for serious mountain bikers.

## 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.

## 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 | #44,077 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #16 in Rear Bike Derailleurs |
| Brand | SHIMANO |
| Brand Name | SHIMANO |
| Case Material Type | Aluminium |
| Color | Black |
| Customer Reviews | 4.6 out of 5 stars 227 Reviews |
| Included Components | Rear Derailleur |
| Item Dimensions L x W x H | 8"L x 5"W x 4"H |
| Item Weight | 203 Grams |
| Manufacturer | Shimano |
| Manufacturer Part Number | ERDM5120SGS |
| Material | Aluminum |
| Material Type | Aluminum |
| Model Number | Shimano |
| Mount Type | Braze-On Mount |
| Mounting Type | Braze-On Mount |
| Number of Teeth | 42 |
| Product Dimensions | 8"L x 5"W x 4"H |
| UPC | 192790618548 |
| Unit Count | 1.0 Count |
| 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

## 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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**Shop now:** [https://www.desertcart.lk/products/434505662-shimano-deore-rd-m5120-rear-derailleur](https://www.desertcart.lk/products/434505662-shimano-deore-rd-m5120-rear-derailleur)

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-07-26*