---
product_id: 228602161
title: "Shimano Deore XT RD-M8120 XT 12-Speed Rear derailleur, Shadow+, SGS, for Double, Black, Long"
brand: "shimano"
price: "$298.51"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/228602161-shimano-deore-xt-rd-m8120-xt-12-speed-rear-derailleur
store_origin: US
region: United States of America
---

# long SGS cage for double chainrings 12-speed precision shifting durable Shadow+ clutch system Shimano Deore XT RD-M8120 XT 12-Speed Rear derailleur, Shadow+, SGS, for Double, Black, Long

**Brand:** shimano
**Price:** $298.51
**Availability:** ✅ In Stock

## Summary

> ⚡ Shift like a pro, ride like a legend.

## Quick Answers

- **What is this?** Shimano Deore XT RD-M8120 XT 12-Speed Rear derailleur, Shadow+, SGS, for Double, Black, Long by shimano
- **How much does it cost?** $298.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/228602161-shimano-deore-xt-rd-m8120-xt-12-speed-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

- • **Shadow+ Clutch Stability:** Minimize chain slap and maximize control with Shimano’s proven clutch tech.
- • **Seamless 12-Speed Shifting:** Experience ultra-smooth gear transitions that keep you ahead on every trail.
- • **Global Standard, Local Edge:** Internationally trusted Shimano quality, designed for peak performance worldwide.
- • **Robust and Lightweight Design:** Crafted from durable materials to withstand rugged rides without weighing you down.
- • **Optimized for Double Chainrings:** Perfectly engineered SGS long cage to handle double setups with ease.

## Overview

The Shimano Deore XT RD-M8120 is a high-performance 12-speed rear derailleur featuring the Shadow+ clutch system for enhanced chain stability, designed specifically for double chainring setups with a long SGS cage. Built with durable materials and precision engineering, it delivers reliable, smooth shifting for serious cyclists seeking top-tier drivetrain performance.

## Description

Deore XT RD-M8120 XT 12-Speed Rear derailleur, Shadow+, SGS, for Double, Black, Long

## 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 |
|---------------|-------|
| Product Dimensions | 5.98"L x 6.14"W x 4.17"H |
| Manufacturer | Shimano Deore XT |
| Global Trade Identification Number | 04550170443658 |
| Item Package Dimensions L x W x H | 6.1 x 6.02 x 4.06 inches |
| Package Weight | 0.46 Kilograms |
| Item Dimensions  LxWxH | 5.98 x 6.14 x 4.17 inches |
| Brand Name | SHIMANO |
| Model Name | Shimano_4550170443658 |
| Suggested Users | unisex |
| Number of Items | 1 |
| Part Number | 160144 |
| Model Year | 2019 |
| Included Components | nothing |
| Size | SGS - long |
| Sport Type | Cycling |

## Product Details

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

## Images

![Shimano 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)

## 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.us/products/228602161-shimano-deore-xt-rd-m8120-xt-12-speed-rear-derailleur](https://www.desertcart.us/products/228602161-shimano-deore-xt-rd-m8120-xt-12-speed-rear-derailleur)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-15*