---
product_id: 181772555
title: "RD-M390 Acera Rear Derailleur, 7 8 9 Speed MTB Bike Bicycle Derailleur …"
brand: "totmox"
price: "KD 0.92"
currency: KWD
in_stock: true
url: https://www.desertcart.com.kw/products/181772555-rd-m390-acera-rear-derailleur-7-8-9-speed-mtb
store_origin: KW
region: Kuwait
---

# Countersunk head screw Aluminum alloy parts Smooth shifting performance RD-M390 Acera Rear Derailleur, 7 8 9 Speed MTB Bike Bicycle Derailleur …

**Brand:** totmox
**Price:** KD 0.92
**Availability:** ✅ In Stock

## Summary

> 🚴‍♀️ Shift into Adventure with Confidence!

## Quick Answers

- **What is this?** RD-M390 Acera Rear Derailleur, 7 8 9 Speed MTB Bike Bicycle Derailleur … by totmox
- **How much does it cost?** KD 0.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/181772555-rd-m390-acera-rear-derailleur-7-8-9-speed-mtb)

## Best For

- totmox enthusiasts

## Why This Product

- Trusted totmox brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Quality Assurance:** 100% guarantee with stringent inspections and a 90-day warranty.
- • **Responsive Design:** Wide link design enhances speed response and performance.
- • **Effortless Shifting:** Experience smooth and light operation with every gear change.
- • **Precision Engineering:** Crafted from durable aluminum alloy for longevity.
- • **Customer-Centric Support:** Dedicated after-sales service for peace of mind.

## Overview

The RD-M390 Acera Rear Derailleur is a high-performance component designed for 7, 8, and 9-speed MTB bikes. Made from robust aluminum alloy, it features a countersunk head screw for enhanced durability and a wide link design that improves speed response and extends service life. With a commitment to quality, it comes with a 90-day warranty and dedicated after-sales support.

## Description

FEATURE: 1. concave guide wheel screw 2. Smooth/easy operation shifting performance 3. Wide connection design for precise shifting and durability 4. Wide connection design, dual servo structure, low-key concept. 5. A variety of specifications to choose from SPECIFICATION: Product Name: RD-M390 Transmission Material: aluminum alloy Weight: 500g Model: RD-M390 Speed: 9 speed / 27 speed Colour: Black Suitable for a variety of tooth change range (28-34T) Recommended models: commuter mountain bike / folding model PACKAGE: 1*RD-M390 transmission

## Features

- 👍Aluminum alloy parts.
- 👍Countersunk head screw.
- 👍Smooth / light operation shifting performance.
- 👍Wide link design to improve the speed response ability and extend the service life.
- 👍100% GUARANTEE - We assure customers that our products are subject to stringent inspection and quality. Please feel free to contact us if there is any problem with the products, we will provide 90-DAYS WARRANTY and AFTER-SALES SERVICE.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Package Dimensions L x W x H | 8.35 x 3.19 x 2.28 inches |
| Package Weight | 0.28 Kilograms |
| Brand Name | TOTMOX |
| Material | Aluminum |
| Manufacturer | TOTMOX |
| Part Number | mtx 7.0 |

## Product Details

- **Brand:** TOTMOX
- **Material:** Aluminum
- **Case Material:** Aluminum
- **Mounting Type:** Braze-On Mount
- **Manufacturer:** TOTMOX

## Images

![RD-M390 Acera Rear Derailleur, 7 8 9 Speed MTB Bike Bicycle Derailleur … - Image 1](https://m.media-amazon.com/images/I/413u5sT+YnL.jpg)
![RD-M390 Acera Rear Derailleur, 7 8 9 Speed MTB Bike Bicycle Derailleur … - Image 2](https://m.media-amazon.com/images/I/6117-wa201L.jpg)
![RD-M390 Acera Rear Derailleur, 7 8 9 Speed MTB Bike Bicycle Derailleur … - Image 3](https://m.media-amazon.com/images/I/61QoV-X5tvL.jpg)
![RD-M390 Acera Rear Derailleur, 7 8 9 Speed MTB Bike Bicycle Derailleur … - Image 4](https://m.media-amazon.com/images/I/61k8SgN03FL.jpg)

## Questions & Answers

**Q: Will this fit on a schwinn Kempo that currently has a tourney rear derailleur?**
A: This is a fake Shimano Acera, so it may not fit right.

**Q: What size derailer hanger dose it need?**
A: Haven't  put it on yet but you guy have great  customer service.  Thank You

**Q: Description says 7/8/9 speed.  mfg says 9 speed.  which is it?**
A: Derailleur travel is determined by the shifter.  It is a 7/8/9 speed derailleur.

**Q: is direct installation possible? was looking to install on an old frame i'm messing with, derailleur would have to be installed directly on the frame**
A: Buy a better derailleur. This one is poorly made.

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**Shop now:** [https://www.desertcart.com.kw/products/181772555-rd-m390-acera-rear-derailleur-7-8-9-speed-mtb](https://www.desertcart.com.kw/products/181772555-rd-m390-acera-rear-derailleur-7-8-9-speed-mtb)

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-02-12*