---
product_id: 155102350
title: "XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black"
brand: "shimano"
price: "VT45542"
currency: VUV
in_stock: true
reviews_count: 13
category: "Shimano"
url: https://www.desertcart.vu/products/155102350-xt-rd-m8100-sgs-rd-m8120-sgs-12-speed-rear
store_origin: VU
region: Vanuatu
---

# Silent drivetrain with bumper 12-speed precision shifting Long cage for wide gear range XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black

**Brand:** shimano
**Price:** VT45542
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black by shimano
- **How much does it cost?** VT45542 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/155102350-xt-rd-m8100-sgs-rd-m8120-sgs-12-speed-rear)

## 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

- • **Durable Long Cage Design:** Handles wide gear ranges with ease, perfect for conquering any terrain or trail.
- • **Whisper-Quiet Performance:** Innovative bumper and reduced tension minimize drivetrain noise for a stealthy ride.
- • **Effortless 12-Speed Shifting:** Experience lightning-fast, shockless gear changes that keep you ahead of the pack.
- • **Proven Reliability & Easy Setup:** Trusted by riders for over 10,000 miles with simple installation and tuning.
- • **Maximized Efficiency with 13T Pulleys:** Large pulleys reduce friction, delivering smoother rides and less energy loss.

## Overview

The SHIMANO XT RD-M8100-SGS is a high-performance 12-speed rear derailleur featuring a long cage design for wide gear compatibility, large 13T pulleys for enhanced efficiency, and a noise-reducing bumper system. Renowned for its fast, smooth, and silent shifting, it offers durability and reliability trusted by cyclists worldwide.

## Description

desertcart.com : Deore XT RD-M8100 SGS Rear Derailleur, 12-speed, Black/Gray : Sports & Outdoors

Review: Simple, Reliable and Great Value - It doesn’t get much better for reliability and cost. My last unit lasted 10k miles plus. Super easy to install and tune, extremely smooth shifting.
Review: Works no mater what the conditions!! - Solid. works like a champ!

## Features

- Fast, shockless shifting and low-profile design.
- Large 13T pulleys increase efficiency.
- Decreased tension in low gear and added bumper improve drivetrain silence.
- 12-speed rear.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07SWQZB46 |
| Best Sellers Rank | #62,280 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #21 in Rear Bike Derailleurs |
| Brand Name | SHIMANO |
| Case Material Type | Alloy Steel |
| Color | Black/Gray |
| Customer Reviews | 4.7 4.7 out of 5 stars (504) |
| Global Trade Identification Number | 04550170443641 |
| Included Components | Rear Derailleur |
| Item Dimensions L x W x H | 7"L x 7"W x 5"H |
| Item Type Name | Rear Derailleur |
| Item Weight | 200 Grams |
| League Name | Shimano |
| Manufacturer | Shimano |
| Manufacturer Part Number | 587830 |
| Material Type | Aluminum |
| Model Number | 587830 |
| Mount Type | Braze-On Mount |
| Number of Teeth | 51 |
| UPC | 192790443645 |
| Unit Count | 1.0 Count |
| Warranty Description | 90 Day Limited |

## Product Details

- **Brand:** SHIMANO
- **Color:** Black/Gray
- **Item Weight:** 200 Grams
- **League:** Shimano
- **Material:** Aluminum

## Images

![XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black - Image 1](https://m.media-amazon.com/images/I/51K46DNzSPL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Simple, Reliable and Great Value
*by R***T on June 23, 2025*

It doesn’t get much better for reliability and cost. My last unit lasted 10k miles plus. Super easy to install and tune, extremely smooth shifting.

### ⭐⭐⭐⭐⭐ Works no mater what the conditions!!
*by D***H on December 27, 2025*

Solid. works like a champ!

### ⭐⭐⭐⭐⭐ all good
*by A***S on March 31, 2025*

good product

## Frequently Bought Together

- SHIMANO XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black
- Shimano XT SL-M8100-L Right Clamp-Band 12-Speed Shifter, Black
- SHIMANO Xt Cs-M8100 12-Speed Cassette

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**Shop now:** [https://www.desertcart.vu/products/155102350-xt-rd-m8100-sgs-rd-m8120-sgs-12-speed-rear](https://www.desertcart.vu/products/155102350-xt-rd-m8100-sgs-rd-m8120-sgs-12-speed-rear)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-02*