---
product_id: 335795512
title: "GRX RD-RX400 GRX 10-Speed Rear derailleur, Shadow+, for Double, Black"
brand: "shimano"
price: "€ 163.30"
currency: EUR
in_stock: true
reviews_count: 7
category: "Shimano"
url: https://www.desertcart.hr/products/335795512-grx-rd-rx400-grx-10-speed-rear-derailleur-shadow-double
store_origin: HR
region: Croatia
---

# Durable black aluminium build 10-speed precision shifting Adjustable chain stabilizer GRX RD-RX400 GRX 10-Speed Rear derailleur, Shadow+, for Double, Black

**Brand:** shimano
**Price:** € 163.30
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift into the future of gravel riding with Shimano GRX precision!

## Quick Answers

- **What is this?** GRX RD-RX400 GRX 10-Speed Rear derailleur, Shadow+, for Double, Black by shimano
- **How much does it cost?** € 163.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/335795512-grx-rd-rx400-grx-10-speed-rear-derailleur-shadow-double)

## 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

- • **Shadow+ Technology:** Low-profile design reduces damage risk and keeps your ride sleek.
- • **Chain Stabilizer Control:** Adjustable tension prevents chain drops, so you never miss a beat.
- • **Plug-and-Play Reliability:** Direct fit for double cranksets—get back on the trail faster with trusted Shimano quality.
- • **Seamless 10-Speed Shifting:** Experience ultra-smooth gear changes tailored for unpredictable terrain.
- • **Robust Aluminium Construction:** Lightweight yet tough, built to endure your longest gravel adventures.

## Overview

The Shimano GRX RD-RX400 is a 10-speed rear derailleur designed specifically for gravel bikes with double cranksets. Featuring Shadow+ low-profile technology and an adjustable chain stabilizer, it ensures smooth, reliable shifting on rough terrain while minimizing chain drops. Crafted from durable materials and backed by a 2-year warranty, this black aluminium component offers professional-grade performance for serious riders.

## Description

Shimano GRX RD-RX400 GRX 10-Speed Rear derailleur, Shadow+, for Double, Black

Review: Know the replacement brand - Not applicable with other brands of derailleurs Waiting on refund after returning
Review: When you need to get on the bike and you need it fast...... - While riding my new gravel bike, I happened to notice that the cranks would not roll backwards. One trip to the bike shop, after almost 1,015 miles later, I noticed my chain was literally sawing through the cage of my rear derailleur. I ordered this device to replace what I had lost. It arrived on time, the rear derailleur was in great condition, (new). When you want to get up and running this is the part that you can count on. Great.

## Features

- Material: Other
- Quiet and smooth shifting system for uneven terrain
- Package dimensions: 9.8 L x 17.6 H x 12.6 W (Zm)
- Adjustable chain stabilizer prevents the chain from jumping out
- Smooth and reliable shifting in changing ground conditions

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07RVXQWKV |
| Best Sellers Rank | #685,074 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #748 in Rear Bike Derailleurs |
| Brand | SHIMANO |
| Brand Name | SHIMANO |
| Case Material Type | Aluminium |
| Color | Black |
| Customer Reviews | 4.5 out of 5 stars 92 Reviews |
| Global Trade Identification Number | 04550170448899 |
| Included Components | Bike Parts |
| Item Dimensions L x W x H | 3.86"L x 4.96"W x 6.93"H |
| Item Type Name | Brakes & Shifters |
| Item Weight | 1 pounds |
| League | GRX |
| League Name | GRX |
| Manufacturer | Shimano GRX |
| Manufacturer Part Number | IRDRX400 |
| Material | other |
| Material Type | other |
| Model Number | C8C075 |
| Mount Type | Braze-On Mount |
| Mounting Type | Braze-On Mount |
| Number of Items | 1 |
| Number of Teeth | 36 |
| Unit Count | 1 Count |
| Warranty Description | 2 Year Manufacturer |

## Product Details

- **Brand:** SHIMANO
- **Color:** Black
- **Item Weight:** 0.02 Ounces
- **Material:** other
- **Mounting Type:** Braze-On Mount

## Images

![GRX RD-RX400 GRX 10-Speed Rear derailleur, Shadow+, for Double, Black - Image 1](https://m.media-amazon.com/images/I/518yQjzdrsS.jpg)

## Customer Reviews

### ⭐ Know the replacement brand
*by A***R on November 29, 2024*

Not applicable with other brands of derailleurs Waiting on refund after returning

### ⭐⭐⭐⭐⭐ When you need to get on the bike and you need it fast......
*by R***. on September 22, 2022*

While riding my new gravel bike, I happened to notice that the cranks would not roll backwards. One trip to the bike shop, after almost 1,015 miles later, I noticed my chain was literally sawing through the cage of my rear derailleur. I ordered this device to replace what I had lost. It arrived on time, the rear derailleur was in great condition, (new). When you want to get up and running this is the part that you can count on. Great.

### ⭐⭐⭐⭐⭐ OK
*by R***N on May 8, 2026*

Alles bestens

## Frequently Bought Together

- Shimano GRX RD-RX400 GRX 10-Speed Rear derailleur, Shadow+, for Double, Black
- Shimano HG50 10 Speed Mountain Bike Cassette 11-36T
- SHIMANO CN-HG95 10-speed HG-X chain - 116 links

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**Shop now:** [https://www.desertcart.hr/products/335795512-grx-rd-rx400-grx-10-speed-rear-derailleur-shadow-double](https://www.desertcart.hr/products/335795512-grx-rd-rx400-grx-10-speed-rear-derailleur-shadow-double)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-09-08*