---
product_id: 15977308
title: "RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur"
brand: "shimano"
price: "R2685"
currency: ZAR
in_stock: true
reviews_count: 11
category: "Shimano"
url: https://www.desertcart.co.za/products/15977308-rd-m640-zee-shadow-plus-10-speed-rear-derailleur
store_origin: ZA
region: South Africa
---

# Aluminum build with sealed bearings Shadow Plus tech for chain stability Compatible with 10-speed Dyna-Sys drivetrains RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur

**Brand:** shimano
**Price:** R2685
**Availability:** ✅ In Stock

## Summary

> 🚵‍♂️ Shift like a pro, ride like a legend.

## Quick Answers

- **What is this?** RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur by shimano
- **How much does it cost?** R2685 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/15977308-rd-m640-zee-shadow-plus-10-speed-rear-derailleur)

## 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

- • **Low-Profile Design:** Slim Shadow design minimizes chainstay contact, protecting your frame and drivetrain from damage.
- • **Pro-Level Durability:** Robust aluminum construction with sealed bearing pulleys ensures long-lasting performance under pressure.
- • **Optimized for 10-Speed:** Designed specifically for Shimano Dyna-Sys 10-speed mountain bike drivetrains for flawless compatibility.
- • **Effortless Installation:** Direct mount frame compatibility and fluoric coated pivot bushings make setup quick and maintenance easy.
- • **Silent Precision Shifting:** Shadow Plus clutch reduces chain bounce and noise for a smooth, quiet ride.

## Overview

The Shimano RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur combines advanced Shadow Plus technology with durable aluminum construction and sealed bearing pulleys. Engineered for Shimano Dyna-Sys 10-speed mountain drivetrains, it offers a low-profile design that reduces chain bounce and noise while protecting your bike frame. Ideal for riders seeking pro-level performance and reliability at a great value.

## Description

Dyna-Sys specific cable pull for (HG-X) 10 speed mountain drivetrains, improved cable routing, shadow design help eliminate drop out contact. Direct mount frame compatible. Aluminum construction with sealed bearing 11-tooth guide pulley. Shadow plus cage tensioner to help eliminate chain bounce and quiet down the drivetrain.

Review: Zee good! - It's awesome to get the same build/design quality of the pro-downhill level derailleurs at a non-pro price. This thing is fairly bulletproof in it's build quality, has a great clutch system to keep my chain from dancing, crazy easy to install with a new chain, and shifts smooth. Being it's not original equipment to my rig, my cassette is such that I have to really watch out for straining my transmission (running a 2x chainring). YES, it's an older bike, but just try and catch me on a downhill. It's not what you have, but how you use it!
Review: Best derailleur ever - This was a lot cheaper when I bought it a few years ago. It is just great. Shame how much it costs now. It's almost still worth it. 10 speed Shimano is basically dead but I'm locked in and loving it. Shifts every bit as good as 10 speed 105, and has the clutch. Super low profile too. Almost looks like an 80's derailleur with the tiny cage. Perfect for a suburban commuter or anything else really. I hear it's been discontinued, another terrible decision by the bike industry.

## Features

- Shadow Plus technology keeps the low profile shape reducing chainstay and other contact, and adds a chain tensioning device reducing noise and dropped chains
- Compatible with Dyna-Sys 10 speed Shimano products
- Aluminum construction with sealed bearing pulleys
- 4 fluoric coated link pivot bushings for smooth operation
- Shimano Reference Number: RD-M640

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007Q4P7UQ |
| Best Sellers Rank | #188,483 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #123 in Rear Bike Derailleurs |
| Brand Name | SHIMANO |
| Customer Reviews | 4.5 4.5 out of 5 stars (226) |
| Date First Available | March 30, 2012 |
| Global Trade Identification Number | 00689228305328 |
| Included Components | Rear Derailleur |
| Item Dimensions LxWxH | 7 x 5 x 4 inches |
| Item Package Dimensions L x W x H | 7.56 x 5 x 3.7 inches |
| Manufacturer | Shimano |
| Model Name | ZEE RD-M640 Rear Derailleur |
| Number of Items | 1 |
| Package Weight | 0.4 Kilograms |
| Part Number | IRDM640SSW |
| Size | Use with 11-32/11-36 Cassette |
| Sport Type | Cycling |
| Style | Rear Derailleur |
| Suggested Users | mens |
| UPC | 689228305328 |
| Warranty Description | Limited Warranty |

## Product Details

- **Brand:** SHIMANO
- **Color:** One Color
- **Material:** Aluminum
- **Mounting Type:** Braze-On Mount
- **Product Dimensions:** 13"L x 9.5"W x 5"H

## Images

![RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur - Image 1](https://m.media-amazon.com/images/I/613VHFTmr-L.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Zee good!
*by E***T on May 22, 2025*

It's awesome to get the same build/design quality of the pro-downhill level derailleurs at a non-pro price. This thing is fairly bulletproof in it's build quality, has a great clutch system to keep my chain from dancing, crazy easy to install with a new chain, and shifts smooth. Being it's not original equipment to my rig, my cassette is such that I have to really watch out for straining my transmission (running a 2x chainring). YES, it's an older bike, but just try and catch me on a downhill. It's not what you have, but how you use it!

### ⭐⭐⭐⭐⭐ Best derailleur ever
*by B***A on June 5, 2024*

This was a lot cheaper when I bought it a few years ago. It is just great. Shame how much it costs now. It's almost still worth it. 10 speed Shimano is basically dead but I'm locked in and loving it. Shifts every bit as good as 10 speed 105, and has the clutch. Super low profile too. Almost looks like an 80's derailleur with the tiny cage. Perfect for a suburban commuter or anything else really. I hear it's been discontinued, another terrible decision by the bike industry.

### ⭐⭐⭐⭐⭐ Great derailer. Great for 20 inch wheel mountain bike.
*by T***R on March 20, 2020*

we Great derailer. It works with my 34 tooth cassette and 30 tooth chainring. Select the part number for 36 tooth cassette. The photos shows it fitting and a 20 inch wheel diameter kids bike. The cage clears the fat 20x 2.8” tires. The derailer keeps the chain on the gears over bumps even with clutch off. There is a slight increase in pulley friction drag with the clutch on and in the largest cassette gear. So my kid rides with the clutch off. Still is a large decrease in chain slap over the stock derailer.

## Frequently Bought Together

- Shimano RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur
- Shimano SL-M640 Zee 10 Speed Shifter
- Shimano HG50 10 Speed Mountain Bike Cassette 11-36T

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**Shop now:** [https://www.desertcart.co.za/products/15977308-rd-m640-zee-shadow-plus-10-speed-rear-derailleur](https://www.desertcart.co.za/products/15977308-rd-m640-zee-shadow-plus-10-speed-rear-derailleur)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-07*