---
product_id: 228602161
title: "Deore XT RD-M8120 XT 12-Speed Rear derailleur, Shadow+, SGS, for Double, Black, Long"
brand: "shimano"
price: "R$2459"
currency: BRL
in_stock: true
reviews_count: 5
category: "Shimano"
url: https://www.desertcart.com.br/products/228602161-deore-xt-rd-m8120-xt-12-speed-rear-derailleur-shadow
store_origin: BR
region: Brazil
---

# 12-speed precision shifting Durable aluminum build Optimized for MTB double chainrings Deore XT RD-M8120 XT 12-Speed Rear derailleur, Shadow+, SGS, for Double, Black, Long

**Brand:** shimano
**Price:** R$2459
**Availability:** ✅ In Stock

## Summary

> 🚵‍♂️ Shift like a pro, ride like a legend.

## Quick Answers

- **What is this?** Deore XT RD-M8120 XT 12-Speed Rear derailleur, Shadow+, SGS, for Double, Black, Long by shimano
- **How much does it cost?** R$2459 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/228602161-deore-xt-rd-m8120-xt-12-speed-rear-derailleur-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

- • **Shadow+ SGS Design:** Enhanced chain stability reduces chain slap and improves control on rough terrain.
- • **Trail-Ready Performance:** Optimized for mountain biking with a 45-tooth capacity to conquer steep climbs and descents.
- • **Seamless 12-Speed Shifting:** Experience ultra-smooth gear transitions with Shimano's advanced 12-speed drivetrain technology.
- • **Robust Aluminum Construction:** Lightweight yet tough aluminum body ensures long-lasting durability on every trail.
- • **Perfect Fit for Double Chainrings:** Specifically engineered for 2x setups, delivering flawless compatibility and performance.

## Overview

The Shimano Deore XT RD-M8120 is a high-performance 12-speed rear derailleur designed for mountain bikes with double chainrings. Crafted from durable aluminum and featuring the Shadow+ SGS system, it offers precise, stable shifting and superior chain retention. Its long cage design supports up to 45 teeth, making it ideal for aggressive trail riding and demanding terrain.

## Description

MTB DEORE XT M8100 Rear Derailleur 2x12S 45 Teeth Black

Review: Alles OK - Was soll man bei so einem Produkt bewerten ???
Review: Impresionante - Todavía no he salido al campo con él, pero las pruebas de instalación son fenomenales.

## Features

- Durable Material
- Modern design
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.
- Item Package Length: 15.2 cm
- Item Package Height: 10.6 cm
- Item Package width: 15.6 cm
- Lower voltage load for rear derailleur and chain in low gears

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07SVM3P2Q |
| Best Sellers Rank | #758,700 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #712 in Rear Bike Derailleurs |
| Brand | SHIMANO |
| Brand Name | SHIMANO |
| Case Material Type | Aluminium |
| Color | Black |
| Customer Reviews | 4.5 out of 5 stars 49 Reviews |
| Global Trade Identification Number | 04550170443658 |
| Included Components | nothing |
| Item Dimensions L x W x H | 5.98"L x 6.14"W x 4.17"H |
| Item Type Name | MTB DEORE XT M8100 Rear Derailleur 2x12S 45 Teeth Black |
| Item Weight | 0.44 Kilograms |
| Manufacturer | Shimano Deore XT |
| Material | Aluminum |
| Material Type | Aluminum |
| Mount Type | Braze-On Mount |
| Mounting Type | Braze-On Mount |
| Number of Teeth | 45 |
| Product Dimensions | 5.98"L x 6.14"W x 4.17"H |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** SHIMANO
- **Color:** Black
- **Material:** Aluminum
- **Item Weight:** 0.44 Kilograms
- **Mounting Type:** Braze-On Mount

## Images

![Deore XT RD-M8120 XT 12-Speed Rear derailleur, Shadow+, SGS, for Double, Black, Long - Image 1](https://m.media-amazon.com/images/I/61H2V+HfJJL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Alles OK
*by K***. on December 9, 2024*

Was soll man bei so einem Produkt bewerten ???

### ⭐⭐⭐⭐⭐ Impresionante
*by C***O on November 19, 2022*

Todavía no he salido al campo con él, pero las pruebas de instalación son fenomenales.

### ⭐⭐⭐⭐⭐ Dérailleur XT : Très fiable, durable et passage de vitesse parfait ! 🚲
*by A***I on November 25, 2025*

J'ai testé ce dérailleur arrière SHIMANO XT 12V (RD-M8100) pendant sept mois maintenant, et je suis extrêmement satisfait. • Durabilité : Il est très bien et durable, résistant à l'usage intensif. • Performance : Il passe très bien les vitesses, offrant une précision et une fluidité constantes, même après plusieurs mois. C'est un dérailleur haut de gamme qui justifie son prix par sa fiabilité et sa performance dans le temps. Un excellent choix pour les cyclistes exigeants.

## Frequently Bought Together

- Shimano Deore XT RD-M8120 XT 12-Speed Rear derailleur, Shadow+, SGS, for Double, Black, Long
- Shimano XT SL-M8100-L Right Clamp-Band 12-Speed Shifter, Black

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**Shop now:** [https://www.desertcart.com.br/products/228602161-deore-xt-rd-m8120-xt-12-speed-rear-derailleur-shadow](https://www.desertcart.com.br/products/228602161-deore-xt-rd-m8120-xt-12-speed-rear-derailleur-shadow)

---

*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-25*