---
product_id: 155102350
title: "XT RD-M8100-SGS RD-M8120-SGS 12-Speed Rear Derailleur, Long Cage, Black"
brand: "shimano"
price: "€ 233.15"
currency: EUR
in_stock: true
category: "Shimano"
url: https://www.desertcart.sk/products/155102350-xt-rd-m8100-sgs-rd-m8120-sgs-12-speed-rear
store_origin: SK
region: Slovakia
---

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

**Brand:** shimano
**Price:** € 233.15
**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?** € 233.15 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/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

- • **Sleek Low-Profile Design:** Modern aesthetics meet functional form for a clean, professional look on your bike.
- • **Whisper-Quiet Drivetrain:** Innovative bumper and tension design minimize noise—ride in stealth mode.
- • **Effortless 12-Speed Shifting:** Experience lightning-fast, shockless gear changes that keep you ahead on every trail.
- • **Durable Alloy Steel & Aluminum Build:** Robust materials ensure long-lasting performance under the toughest conditions.
- • **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 long cage rear derailleur engineered for precision and durability. Featuring large 13T pulleys for enhanced efficiency, a low-profile design for reduced snagging, and advanced tension and bumper technology for silent operation, it’s built from premium alloy steel and aluminum to withstand demanding rides. Perfect for serious cyclists seeking smooth, reliable shifting and a competitive edge.

## Description

desertcart.com : Shimano XT RD-M8100-SGS Rear Derailleur - 12-Speed, Long Cage, Black, For 1x : 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 | #43,189 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #15 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 (549) |
| 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 g |
| League Name | Shimano |
| Manufacturer | Shimano |
| Manufacturer Part Number | 587830 |
| Material Type | Aluminum |
| Model Number | 587830 |
| Mount Type | Braze-On Mount |
| Number of Items | 1 |
| Number of Teeth | 51 |
| UPC | 192790443645 |
| Unit Count | 1 Count |
| Warranty Description | 90 Day Limited |

## Product Details

- **Brand:** SHIMANO
- **Color:** Black/Gray
- **Item Weight:** 200 g
- **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.

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

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-09-20*