---
product_id: 368060044
title: "SHIMANO XT RD-M8100-SGS RD-M8120-SGS Rear Derailleur - 12-Speed, Long Cage, Black"
brand: "shimano"
price: "$279"
currency: NZD
in_stock: true
reviews_count: 13
url: https://www.desertcart.nz/products/368060044-shimano-xt-rd-m8100-sgs-rd-m8120-sgs-rear-derailleur
store_origin: NZ
region: New Zealand
---

# Long cage design Sleek black finish 12-speed precision SHIMANO XT RD-M8100-SGS RD-M8120-SGS Rear Derailleur - 12-Speed, Long Cage, Black

**Brand:** shimano
**Price:** $279
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Shift into the Future of Cycling!

## Quick Answers

- **What is this?** SHIMANO XT RD-M8100-SGS RD-M8120-SGS Rear Derailleur - 12-Speed, Long Cage, Black by shimano
- **How much does it cost?** $279 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/368060044-shimano-xt-rd-m8100-sgs-rd-m8120-sgs-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

- • **Sleek & Stylish:** The black finish not only looks great but also resists wear and tear.
- • **Unleash Your Ride:** Experience seamless 12-speed shifting for ultimate performance.
- • **Upgrade Your Gear:** Join the elite cycling community with this top-tier derailleur.
- • **Precision Engineering:** Crafted by Shimano, ensuring reliability and durability on every ride.
- • **Engineered for Adventure:** Long cage design accommodates a wide gear range for all terrains.

## Overview

The SHIMANO XT RD-M8100-SGS RD-M8120-SGS Rear Derailleur is a high-performance 12-speed component designed for serious cyclists. Its long cage design allows for a wide gear range, making it perfect for various terrains, while the sleek black finish adds a touch of style and durability.

## Description

Deore XT RD-M8100 Rear DerailleurLong cage is designed to be used with 2x12 drivetrain systemsOffers fast and shockless shifting thanks to HYPERGLIDE+ technologyThe low-profile design includes a bumper added to the derailleur pulley cageShimano Shadow RD+ technology reduces chain slap and creates a quieter drivetrainIncludes large 13t pulleyDrivetrain is silent in all gear positions with decreased rear derailleur and chain tension in low gearItem SpecificationsRear Derailleur Mount Type10x1 StandardRear Der/Shifter CompatibilityShimano MountainCage LengthLongDrivetrain Speeds12Weight284ColorBlackChain Wrap Capacity (teeth)45Largest Cog45

## Features

- About this item
- Deore XT RD-M8100

## Images

![SHIMANO XT RD-M8100-SGS RD-M8120-SGS Rear Derailleur - 12-Speed, Long Cage, Black - Image 1](https://m.media-amazon.com/images/I/41K0euclXgL.jpg)
![SHIMANO XT RD-M8100-SGS RD-M8120-SGS Rear Derailleur - 12-Speed, Long Cage, Black - Image 2](https://m.media-amazon.com/images/I/41O7TagIPjL.jpg)
![SHIMANO XT RD-M8100-SGS RD-M8120-SGS Rear Derailleur - 12-Speed, Long Cage, Black - Image 3](https://m.media-amazon.com/images/I/51ePyjP8GQL.jpg)
![SHIMANO XT RD-M8100-SGS RD-M8120-SGS Rear Derailleur - 12-Speed, Long Cage, Black - Image 4](https://m.media-amazon.com/images/I/41AhXgDeuLL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Best derailleur ever!
  

*by H***R on Reviewed in the United States on January 30, 2021*

This derailleur is phenomenal!!! Shifting is amazing and no skipping at all.This 12 speed derailleur is being used with a Shimano slx 11 speed shifter and 11-51 SunRace cassette.

### ⭐ 







  
  
    Good shifting. Shipped broken though
  

*by J***E on Reviewed in the United States on July 1, 2020*

First off, I went ahead and installed the derailleur because my old one was broken and as any mtn biker I "needed" to ride.  The broken piece is more a hassle than anything.  The broken lever switch piece was in it's own bag inside the box.  (pic 1).  It was clearly a broken piece and I found where it was broken from immediately.  Again, I didn't want to wait another 2 weeks for a new one. Once installed it shifts great and to their credit, it shipped quicker than expected.  That said, this didn't break in shipping.  Was this something that was returned and not inspected? I dunno.

### ⭐⭐⭐⭐⭐ 







  
  
    Strong, precise and reliable
  

*by F***A on Reviewed in the United States on April 24, 2021*

Shimano's quality on this XT derailleur is simply excellent. Very precise, smooth and strong...I'd say that it takes much more abuse than the XTR ones. the only thing is that you have to do some maintenance on the clutch, make sure to clean it once in a while and put some waterproof grease on it (Check out for the instructions on Youtube).

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**Shop now:** [https://www.desertcart.nz/products/368060044-shimano-xt-rd-m8100-sgs-rd-m8120-sgs-rear-derailleur](https://www.desertcart.nz/products/368060044-shimano-xt-rd-m8100-sgs-rd-m8120-sgs-rear-derailleur)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-11*