---
product_id: 631045030
title: "SHIMANO Grx Rd-Rx825 12-Speed Di2 Rear Derailleur Black, Rear, 12-Speed"
brand: "shimano"
price: "3425 zł"
currency: PLN
in_stock: true
url: https://www.desertcart.pl/products/631045030-shimano-grx-rd-rx825-12-speed-di2-rear-derailleur-black
store_origin: PL
region: Poland
---

# 12-speed Di2 electronic shifting Integrated wireless connectivity Adjustable chain stabilizer with ON/OFF switch SHIMANO Grx Rd-Rx825 12-Speed Di2 Rear Derailleur Black, Rear, 12-Speed

**Brand:** shimano
**Price:** 3425 zł
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Shift Smart, Ride Fearless – The Future of Gravel Drivetrains

## Quick Answers

- **What is this?** SHIMANO Grx Rd-Rx825 12-Speed Di2 Rear Derailleur Black, Rear, 12-Speed by shimano
- **How much does it cost?** 3425 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/631045030-shimano-grx-rd-rx825-12-speed-di2-rear-derailleur-black)

## 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

- • **Ready for Adventure:** Compatible with 11-34t and 11-36t cassettes, perfect for your ultimate gravel setup.
- • **Tailored Terrain Control:** Switchable clutch tension stabilizer adapts instantly from gravel grit to smooth roads.
- • **Whisper-Quiet Performance:** Shimano Shadow RD+ technology minimizes chain slap for a silent, smooth ride.
- • **Precision at Your Fingertips:** Experience lightning-fast, reliable 12-speed Di2 shifting that conquers any terrain.
- • **Seamless Wireless Integration:** Built-in wireless unit and charging port for effortless setup and maintenance.

## Overview

The SHIMANO GRX RD-RX825 12-Speed Di2 Rear Derailleur combines cutting-edge wireless electronic shifting with a compact, integrated design. Featuring Shimano’s Shadow RD+ clutch system and an adjustable chain stabilizer with ON/OFF switch, it delivers quiet, precise gear changes optimized for mixed terrain. Compatible with 11-34t and 11-36t cassettes, this rear derailleur is engineered for gravel riders seeking reliable performance and effortless control.

## Description

SHIMANO Grx Rd-Rx825 12-Speed Di2 Rear Derailleur Black, Rear, 12-Speed

## Features

- Integrated wireless unit, charging port, and switch allows a compact design
- Offers fast and reliable shifting on rough terrain
- Adjustable chain stabilizer prevents chain slap
- Shimano Shadow RD+ offers a quiter drivetrain by utilizes a stablizer to reduce chain slap and provides a simple solution for chain drops
- Gravel-tuned clutch tension features a switch stabilizer ON/OFF to match terrain - ON for gravel, OFF for smooth roads

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Package Dimensions L x W x H | 10 x 8 x 2 inches |
| Package Weight | 11.84 ounces |
| Item Dimensions  LxWxH | 6.35 x 6.11 x 3.83 inches |
| Item Weight | 1.1 Pounds |
| Brand Name | SHIMANO |
| Warranty Description | Limited Warranty |
| Model Name | IRDRX825A |
| Color | Black |
| Material | Multi |
| Suggested Users | unisex-adult |
| Manufacturer | Shimano |
| Part Number | IRDRX825A |
| Included Components | Rear Derailleur |
| Size | Rear, 12-Speed |

## Images

![SHIMANO Grx Rd-Rx825 12-Speed Di2 Rear Derailleur Black, Rear, 12-Speed - Image 1](https://m.media-amazon.com/images/I/61sd1bMq34L.jpg)
![SHIMANO Grx Rd-Rx825 12-Speed Di2 Rear Derailleur Black, Rear, 12-Speed - Image 2](https://m.media-amazon.com/images/I/51IccfBrzgL.jpg)
![SHIMANO Grx Rd-Rx825 12-Speed Di2 Rear Derailleur Black, Rear, 12-Speed - Image 3](https://m.media-amazon.com/images/I/61K1UQtAmIL.jpg)
![SHIMANO Grx Rd-Rx825 12-Speed Di2 Rear Derailleur Black, Rear, 12-Speed - Image 4](https://m.media-amazon.com/images/I/51T6bqAIL6L.jpg)

## Frequently Bought Together

- SHIMANO Grx Rd-Rx825 12-Speed Di2 Rear Derailleur Black, Rear, 12-Speed
- SHIMANO BRBX Pads + spg Alloy Back Resin L05A w/Fin Black one Size

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**Shop now:** [https://www.desertcart.pl/products/631045030-shimano-grx-rd-rx825-12-speed-di2-rear-derailleur-black](https://www.desertcart.pl/products/631045030-shimano-grx-rd-rx825-12-speed-di2-rear-derailleur-black)

---

*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-01-26*