---
product_id: 155102350
title: "SHIMANO XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black"
brand: "shimano"
price: "840.50 DT"
currency: TND
in_stock: true
category: "Shimano"
url: https://www.desertcart.tn/products/155102350-shimano-xt-rd-m8100-sgs-rd-m8120-sgs-12-speed
store_origin: TN
region: Tunisia
---

# Long cage for wide gear range 12-speed precision shifting Large 13T pulleys boost efficiency SHIMANO XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black

**Brand:** shimano
**Price:** 840.50 DT
**Availability:** ✅ In Stock

## Summary

> ⚡ Shift like a pro, ride like you own the trail!

## Quick Answers

- **What is this?** SHIMANO XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black by shimano
- **How much does it cost?** 840.50 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/155102350-shimano-xt-rd-m8100-sgs-rd-m8120-sgs-12-speed)

## 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

- • **Long Cage Power:** Handle a wider gear range effortlessly with the durable long cage design.
- • **Whisper-Quiet Ride:** Reduced tension and added bumper technology deliver near-silent drivetrain performance.
- • **Efficiency Maximized:** Large 13T pulleys increase drivetrain efficiency for faster, smoother rides.
- • **Plug & Play Reliability:** Easy installation and tuning mean you’re trail-ready in minutes with Shimano’s trusted durability.
- • **Seamless 12-Speed Shifting:** Experience ultra-smooth, shockless gear changes that keep you ahead on every trail.

## Overview

The Shimano Deore XT RD-M8100-SGS is a high-performance 12-speed long cage rear derailleur engineered for trail riders seeking fast, precise, and silent shifting. Featuring large 13T pulleys for enhanced drivetrain efficiency and a low-profile design, it offers reliable durability and easy setup, making it a top choice for serious cyclists demanding smooth gear transitions and wide gear range compatibility.

## Description

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

## 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 | #102,598 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #48 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 (531) |
| 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

![SHIMANO 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.

## 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.tn/products/155102350-shimano-xt-rd-m8100-sgs-rd-m8120-sgs-12-speed](https://www.desertcart.tn/products/155102350-shimano-xt-rd-m8100-sgs-rd-m8120-sgs-12-speed)

---

*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-06-24*