---
product_id: 612523151
title: "Shimano Grx Rx820 12-Speed Rear Derailleur Black, Gs, 12-Speed"
brand: "shimano"
price: "₩405604"
currency: KRW
in_stock: true
url: https://www.desertcart.kr/products/612523151-shimano-grx-rx820-12-speed-rear-derailleur-black-gs-12
store_origin: KR
region: South Korea
---

# quiet Shadow Plus chain stabilizer 12-speed precision shifting durable aluminum & composite build Shimano Grx Rx820 12-Speed Rear Derailleur Black, Gs, 12-Speed

**Brand:** shimano
**Price:** ₩405604
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift into adventure mode with precision and silence!

## Quick Answers

- **What is this?** Shimano Grx Rx820 12-Speed Rear Derailleur Black, Gs, 12-Speed by shimano
- **How much does it cost?** ₩405604 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/612523151-shimano-grx-rx820-12-speed-rear-derailleur-black-gs-12)

## 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

- • **Rugged Yet Lightweight:** Crafted from corrosion-resistant aluminum and composite materials for lasting performance without the weight.
- • **Seamless 12-Speed Shifting:** Experience flawless gear transitions tailored for endurance and adventure cycling.
- • **Shadow Plus Tech for Silence:** Integrated chain stabilizer minimizes chain slap and noise on rough terrain—ride with confidence.
- • **Versatile Direct Mount Design:** Medium cage with interchangeable GS/SGS options ensures compatibility and easy maintenance for gravel and cyclocross pros.
- • **Terrain-Adaptive Stabilizer Switch:** Quickly toggle chain tension for optimal control whether climbing steep hills or descending fast trails.

## Overview

The Shimano GRX RD-RX822-GS 12-speed rear derailleur combines durable, lightweight construction with advanced Shadow Plus technology for quiet, secure shifting. Designed for 10-45T MTB cassettes, it features an adjustable stabilizer switch and versatile direct mount medium cage, making it the ultimate drivetrain upgrade for endurance, gravel, and cyclocross riders seeking reliable performance across diverse terrains.

## Description

Grx Rx820 12-Speed Rear Derailleur Black, Gs, 12-Speed

## Features

- Optimized for endurance and versatility, the GRX RD-RX822-GS rear derailleur features a durable, lightweight construction with aluminum and composite materials for longevity and corrosion resistance.
- Engineered with 's innovative Shadow Plus technology and an integrated chain stabilizer, this derailleur provides quieter, more secure shifting on rough terrain, reducing chain slap and preventing drops during demanding rides.
- Designed for 12-speed MTB cassettes from 10 to 45 teeth, it offers seamless gear transitions with compatibility for HG 12-Speed chains, ensuring smooth performance across mixed surfaces and off-road adventures.
- The adjustable ON/OFF stabilizer switch allows quick adaptation to various terrains, enabling riders to optimize chain tension for both climbing and descent, enhancing overall ride stability and confidence.
- Featuring a direct mount, medium cage design with an interchangeable GS/SGS cage, this derailleur offers versatile compatibility and easy maintenance, making it an ideal choice for gravel, cyclocross, and adventure cycling enthusiasts.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Shimano |
| UPC | 192790303635 |
| Item Package Dimensions L x W x H | 6.3 x 5 x 3.9 inches |
| Package Weight | 0.44 Kilograms |
| Item Dimensions  LxWxH | 6.25 x 4 x 4.75 inches |
| Brand Name | SHIMANO |
| Warranty Description | Limited Warranty |
| Model Name | GRX RD-RX822 12-Speed Rear Derailleurs |
| Suggested Users | mens |
| Number of Items | 1 |
| Part Number | IRDRX822GS |
| Style | Rear Derailleur |
| Included Components | Rear Derailleur |
| Size | GS, 12-Speed |

## Product Details

- **Brand:** SHIMANO
- **Color:** Black
- **Material:** Multi
- **Item Weight:** 0.5 Pounds
- **Mounting Type:** Clamp-On Mount

## Images

![Shimano Grx Rx820 12-Speed Rear Derailleur Black, Gs, 12-Speed - Image 1](https://m.media-amazon.com/images/I/51p3oFaorcL.jpg)

## Frequently Bought Together

- Shimano Grx Rx820 12-Speed Rear Derailleur Black, Gs, 12-Speed
- SHIMANO Xt Cs-M8100 12-Speed Cassette
- Shimano Grx Rx820 12-Speed Rear Derailleur Black, 12-Speed

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**Shop now:** [https://www.desertcart.kr/products/612523151-shimano-grx-rx820-12-speed-rear-derailleur-black-gs-12](https://www.desertcart.kr/products/612523151-shimano-grx-rx820-12-speed-rear-derailleur-black-gs-12)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-01-31*