---
product_id: 228602161
title: "Deore XT RD-M8120 XT 12-Speed Rear derailleur, Shadow+, SGS, for Double, Black, Long"
brand: "shimano"
price: "NT$9636"
currency: TWD
in_stock: true
reviews_count: 5
category: "Shimano"
url: https://www.desertcart.tw/products/228602161-deore-xt-rd-m8120-xt-12-speed-rear-derailleur-shadow
store_origin: TW
region: Taiwan
---

# 12-speed precision shifting durable Shadow+ SGS design optimized for double chainrings Deore XT RD-M8120 XT 12-Speed Rear derailleur, Shadow+, SGS, for Double, Black, Long

**Brand:** shimano
**Price:** NT$9636
**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?** NT$9636 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/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

- • **Global MTB Standard:** Trusted by pros worldwide, this international model ensures top-tier performance and compatibility.
- • **Durable, Lightweight Build:** Crafted with premium materials to withstand rugged MTB conditions without adding unnecessary weight.
- • **Seamless 12-Speed Shifting:** Experience ultra-smooth gear transitions with Shimano’s advanced 12-speed drivetrain technology.
- • **Shadow+ SGS Long Cage Design:** Enhanced chain stability and reduced chain slap for aggressive trail riding and downhill control.
- • **Optimized for Double Chainrings:** Perfectly engineered for 2x setups, delivering precise and reliable performance on varied terrains.

## Overview

The Shimano Deore XT RD-M8120 is a high-performance 12-speed rear derailleur designed for mountain biking enthusiasts who demand precision and durability. Featuring the Shadow+ SGS long cage design, it minimizes chain slap and enhances stability on rough trails. Engineered for double chainring setups, this lightweight yet robust component ensures smooth, reliable shifting across all gears, making it a must-have for serious riders seeking professional-grade drivetrain performance.

## Description

MTB DEORE XT M8100 Rear Derailleur 2x12S 45 Teeth Black

Review: Was soll man bei so einem Produkt bewerten ???
Review: 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 | #668,083 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #661 in Rear Bike Derailleurs |
| Brand Name | SHIMANO |
| Customer Reviews | 4.4 4.4 out of 5 stars (50) |
| Date First Available | July 22, 2019 |
| Global Trade Identification Number | 04550170443658 |
| Included Components | nothing |
| Item Dimensions LxWxH | 5.98 x 6.14 x 4.17 inches |
| Item Package Dimensions L x W x H | 6.1 x 6.02 x 4.06 inches |
| Manufacturer | Shimano Deore XT |
| Model Name | Shimano_4550170443658 |
| Model Year | 2019 |
| Number of Items | 1 |
| Package Weight | 0.46 Kilograms |
| Part Number | 160144 |
| Product Dimensions | 5.98"L x 6.14"W x 4.17"H |
| Size | SGS - long |
| Sport Type | Cycling |
| Suggested Users | unisex |

## Product Details

- **Brand:** SHIMANO
- **Color:** Black
- **Item Weight:** 0.44 Kilograms
- **Material:** Aluminum
- **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

### ⭐⭐⭐⭐⭐ Review
*by K***. on December 9, 2024*

Was soll man bei so einem Produkt bewerten ???

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

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

### ⭐⭐⭐⭐⭐ Review
*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.tw/products/228602161-deore-xt-rd-m8120-xt-12-speed-rear-derailleur-shadow](https://www.desertcart.tw/products/228602161-deore-xt-rd-m8120-xt-12-speed-rear-derailleur-shadow)

---

*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-03-23*