---
product_id: 15977308
title: "RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur"
brand: "shimano"
price: "C$9359"
currency: NIO
in_stock: true
reviews_count: 8
url: https://www.desertcart.ni/products/15977308-rd-m640-zee-shadow-plus-10-speed-rear-derailleur
store_origin: NI
region: Nicaragua
---

# Noise-reducing Shadow Plus tech 10-speed precision shifting Durable aluminum with sealed bearings RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur

**Brand:** shimano
**Price:** C$9359
**Availability:** ✅ In Stock

## Summary

> ⚡ Shift like a pro, ride like you own the trail.

## Quick Answers

- **What is this?** RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur by shimano
- **How much does it cost?** C$9359 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/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

- • **Built to Last:** Robust aluminum construction paired with sealed bearing pulleys for long-lasting performance.
- • **Direct Mount Ready:** Designed for direct mount frames, making upgrades seamless and sleek.
- • **Effortless Operation:** Fluorine-coated pivot bushings deliver silky smooth derailleur movement under all conditions.
- • **Silent Shifts, Smooth Rides:** Shadow Plus tech minimizes chain bounce and drivetrain noise for a whisper-quiet ride.
- • **Precision 10-Speed Compatibility:** Optimized for Dyna-Sys 10-speed mountain drivetrains ensuring flawless gear changes.

## Overview

The Shimano RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur combines cutting-edge Shadow Plus technology with durable aluminum construction and sealed bearing pulleys. Engineered for Dyna-Sys 10-speed mountain drivetrains, it reduces chain bounce and noise while delivering precise, smooth shifting. Ideal for serious riders seeking reliable, high-performance drivetrain upgrades.

## 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.

## 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 |
|---------------|-------|
| UPC | 689228305328 |
| Global Trade Identification Number | 00689228305328 |
| Item Package Dimensions L x W x H | 7.56 x 5 x 3.7 inches |
| Package Weight | 0.4 Kilograms |
| Item Dimensions  LxWxH | 7 x 5 x 4 inches |
| Brand Name | SHIMANO |
| Warranty Description | Limited Warranty |
| Model Name | IRDM640SSW |
| Suggested Users | mens |
| Number of Items | 1 |
| Part Number | IRDM640SSW |
| Included Components | Rear Derailleur |
| Size | Use with 11-32/11-36 Cassette |
| Sport Type | Cycling |

## Product Details

- **Brand:** SHIMANO
- **Color:** One Color
- **Material:** Aluminum
- **Mounting Type:** Braze-On Mount
- **Manufacturer:** Shimano

## 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 Name** 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!

### ⭐⭐⭐⭐⭐ 10 speed Zee derailleur...why would you buy anything else?
*by A***Y on May 9, 2014*

This derailleur is awesome!Pros: No chain slap! Easy setup! Shifts real nice and crisp like!Cons: It doesn't go to class for me so I can ride more.Hit light downhill trails and dirt jumps with it. No problems yet. Had one small fall that only scratched the derailleur but didn't hurt it mechanically in any way.Note: This isn't exactly a con because you will probably never need to touch the clutch tension adjustment inside the derailleur, but should you decide to mess around with it I want to warn you that Shimano put red locktitie on the 3 small bolts that hold the cover on. This can make removal tricky. If you use a slightly rounded or wrong size hex key you will most likely strip the socket cap screws.

### ⭐⭐⭐⭐⭐ 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.ni/products/15977308-rd-m640-zee-shadow-plus-10-speed-rear-derailleur](https://www.desertcart.ni/products/15977308-rd-m640-zee-shadow-plus-10-speed-rear-derailleur)

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-02-12*