---
product_id: 143966726
title: "XTR Rd-M9120 Rear Derailleur Stealth Gray, Sgs 12 Speed"
brand: "shimano"
price: "€ 323.18"
currency: EUR
in_stock: true
url: https://www.desertcart.ie/products/143966726-xtr-rd-m9120-rear-derailleur-stealth-gray-sgs-12-speed
store_origin: IE
region: Ireland
---

# 41t max cassette capacity 12-speed precision gearing Shadow RD+ clutch for chain retention XTR Rd-M9120 Rear Derailleur Stealth Gray, Sgs 12 Speed

**Brand:** shimano
**Price:** € 323.18
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Shift into the future with stealth and precision!

## Quick Answers

- **What is this?** XTR Rd-M9120 Rear Derailleur Stealth Gray, Sgs 12 Speed by shimano
- **How much does it cost?** € 323.18 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/143966726-xtr-rd-m9120-rear-derailleur-stealth-gray-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

- • **Maximized Gear Range:** Tackle any terrain confidently with a massive 10-45t cassette compatibility and 41t capacity.
- • **Silent & Stable Ride:** Larger 13t pulley wheels and a protective bumper reduce friction and chain slap for whisper-quiet performance.
- • **Effortless 12-Speed Shifting:** Experience ultra-smooth gear changes with Shimano’s cutting-edge 12-speed drivetrain technology.
- • **Optimized for Two-by Systems:** Designed specifically for double-ring cranksets, giving you more gears and seamless front-to-rear transitions.
- • **Rugged Durability Meets Lightweight Design:** Crafted from premium aluminum in stealth gray, combining strength with sleek, professional aesthetics.

## Overview

The Shimano XTR RD-M9120 Rear Derailleur in Stealth Gray is a high-performance, 12-speed SGS model designed for two-by drivetrains. Engineered with a 41t capacity and compatible with Shimano’s XTR 10-45t cassette, it features larger 13t pulley wheels and a Shadow RD+ clutch system for superior chain retention and ultra-quiet, smooth shifting. Built from durable aluminum, it’s the ultimate upgrade for serious cyclists seeking precision, reliability, and a sleek look.

## Description

Shimano may have taken its sweet time when jumping into the world of 12-speed, but patience is a virtue, and it seems like our wait was certainly rewarded, as its new XTR 12-speed groupset soars right back to the front of the cutting edge, while offering even better shifting performance than before. But just because Shimano soared into the future doesn't mean its designers didn't still keep an eye out for those who are still all-for the two-by persuasion, and the XTR RD-M9120 Rear Derailleur drives the point home. This two-by optimized rear derailleur is specifically designed to pair Shimano's 10-45-tooth 12-speed cassette with a double-ring crankset, offering more gears than most of us know what to do with, while keeping things quiet and smooth. The M9120 Rear Derailleur sees improved chain stability and reduced friction thanks to larger 13t pulley wheels, making it better able to withstand full-force pedaling while shifting gears as smoothly as ever. Shimano was also able to decrease the rear derailleur tension in the lower gear positions, preventing the high chain tension that causes excess friction and noise, and thus a loss of efficiency. The Shadow RD+ clutch system provides excellent chain retention in rough terrain, and keeps annoying chain slap to a minimum. Lastly, the addition of a protective bumper to the inside of the derailleur cage quiets operation even further by cushioning the sound of any chain rub. Because the RD-M9120 is optimized for a two-by system, it only comes in Shimano's SGS model. This means the derailleur has plenty of range to take on the new 10-45t Ryhtym-Step 12-speed cassette, and allows for some play in the front when you're swapping from the little ring to big ring.

## Features

- Material: aluminum
- Capacity: 41t
- Cassette Range: 10 - 45t
- Gearing: 2 x 12
- Compatibility: [chain] XTR CN-M9100, [cassette] XTR CS-M9100, [shifter] XTR SL-M9100-R, XTR SL-M9100-IR, [front derailleur] XTR FD-9100-M, XTR FD-9100-E, XTR FD-M9100-D

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Shimano |
| UPC | 689228880269 |
| Item Package Dimensions L x W x H | 6.1 x 6.02 x 3.9 inches |
| Package Weight | 0.41 Kilograms |
| Item Dimensions  LxWxH | 7 x 7 x 5 inches |
| Brand Name | SHIMANO |
| Suggested Users | mens |
| Number of Items | 1 |
| Part Number | IRDM9120SGS |
| Size | SGS 12 Speed |

## Product Details

- **Brand:** SHIMANO
- **Color:** Stealth Gray
- **Material:** Aluminum
- **Item Weight:** 0.4 Pounds
- **Mounting Type:** Braze-On Mount

## Images

![XTR Rd-M9120 Rear Derailleur Stealth Gray, Sgs 12 Speed - Image 1](https://m.media-amazon.com/images/I/61jNB4XldcL.jpg)

## Questions & Answers

**Q: Que relación máxima y mínima de piñones puede manejar? 11-45, 11-50, 10-50?**
A: Shimano xtr puede soportar un piñón 10-51 y también 10-45 y 11-50 pero está echo para soportar 10-51

**Q: Can i replace an xt derailuer for m8000 1x10 wi this? is there a specific model to chose for this swap?**
A: No, The M9100 is very specific to gear size and cassette size either  sg & sgs and are not interchangable even on 12 speed specific. Also the cogs are specific to not only 12 speed but to shimano hyper glide chain only, Using this with any other components will leave you dissatisfied. I also tried this with my 1x10 and ended up going to full 1x12 shimano everything. This the best shifting on the market. If you want to keep 1x10 stay with the M8000 again this will be the best shifting on the market if you use shimano chains

**Q: Hi is the rd-m9100 sgs single crank for 12speed?**
A: Tried in 1x12 set up, works fine

**Q: can someone please explain the 9100 vx 9120 designation?**
A: It looks like 9120 is for 2x drivetrains with max cassette cog of 45t, whereas the 9100 is for single ring drivetrains and up to 51t.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ie/products/143966726-xtr-rd-m9120-rear-derailleur-stealth-gray-sgs-12-speed](https://www.desertcart.ie/products/143966726-xtr-rd-m9120-rear-derailleur-stealth-gray-sgs-12-speed)

---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-06*