---
product_id: 451202909
title: "Rear Derailleur, Huazu Bike Parts Gear Shifter for RD-TZ31-A with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles"
brand: "huazu"
price: "€ 42.73"
currency: EUR
in_stock: true
url: https://www.desertcart.pt/products/451202909-rear-derailleur-huazu-bike-parts-gear-shifter-for-rd-tz31
store_origin: PT
region: Portugal
---

# Direct mount design 6/7 speed compatibility Durable aluminum alloy Rear Derailleur, Huazu Bike Parts Gear Shifter for RD-TZ31-A with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles

**Brand:** huazu
**Price:** € 42.73
**Availability:** ✅ In Stock

## Summary

> 🚴‍♂️ Shift into the future with precision and power!

## Quick Answers

- **What is this?** Rear Derailleur, Huazu Bike Parts Gear Shifter for RD-TZ31-A with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles by huazu
- **How much does it cost?** € 42.73 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/451202909-rear-derailleur-huazu-bike-parts-gear-shifter-for-rd-tz31)

## Best For

- huazu enthusiasts

## Why This Product

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

## Key Features

- • **Wide Gear Capacity:** Supports up to 34T total capacity with sprockets ranging from 14T to 28T, perfect for varied terrain.
- • **Lightweight Yet Durable:** Crafted from premium aluminum alloy and plastic for long-lasting performance without the bulk.
- • **Universal Compatibility:** Fits mountain, road, folding bikes, and more—upgrade your ride with confidence and style.
- • **Robust Direct Mount Build:** Engineered with a direct mount system for secure attachment and enhanced stability—no hub bolt needed.
- • **Seamless 6/7 Speed Shifting:** Optimized for GS 6/7 speed SIS Index drivetrains, ensuring smooth gear transitions on every ride.

## Overview

The Huazu RD-TZ31-A Rear Derailleur is a high-performance, direct mount gear shifter designed for 6/7 speed mountain and road bikes. Made from durable aluminum alloy, it offers stable, smooth shifting with a total capacity of 34T and fits a wide range of bike types. Backed by a 12-month warranty, it’s the reliable upgrade your bike deserves.

## Description

Huazu Rear Derailleur RD-TZ31-A 6/7 Speed Direct Mount for Mountain Bike, designed to provide smooth and stable gear shift performance, and making riding easy and comfortable.Fit For: Suitable for Shimano, mountain bikes, road bikes, folding bicycles, tricycles ect. Condition: 100% newMaterial: aluminium alloy Mount Tape: Direct mount, not hub bolt mount.Packing Included: — 1pcs Rear Derailleur — 1pcs Supporting Bolt After-sales service：Please feel free to contact us if you have any issues with the Rear Derailleur, don't worry about after-sales service. We accept return/replace with any reason. We provide 12-MONTH warranty for all of our products since the purchasing day.

## Features

- MODEL: RD-TZ31-A bike rear derailleur, Compatible with GS 6 / 7 speed SIS Index Shifting drivetrains.
- STABILITY: Durable aluminum alloy and plastic alloy material, Providing excellent shifting performance ensure safe and stable.
- PARM: Total capacity 34T, Largest sprocket 28T, Smallest sprocket 14T, Front chain wheel tooth difference 20T.
- NOTE: The bike rear derailleur is direct mount, not hub bolt mount. Please check the mount type of the original part before ordering, if bike frame with hook, as picture shows, you can use it.
- COMPATIBILITY: Suitable for mountain bikes, road bikes, folding bicycles and so on.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product dimensions | 13L x 10W x 4H centimeters |
| Manufacturer | Huazu |
| UPC | 731235765869 |
| Color | Black |
| Size | L |
| Material Type | Aluminum |
| Batteries Included? | No |
| Department | unisex-adult |
| Item model number | RDTZ31A |
| ASIN | B09WRBHZNT |

## Product Details

- **Brand:** Huazu
- **Colour:** Black
- **Material:** Aluminum
- **Item weight:** 0.28 Kilograms
- **Mounting type:** Braze-On Mount

## Images

![Rear Derailleur, Huazu Bike Parts Gear Shifter for RD-TZ31-A with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles - Image 1](https://m.media-amazon.com/images/I/716ziE224XL.jpg)
![Rear Derailleur, Huazu Bike Parts Gear Shifter for RD-TZ31-A with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles - Image 2](https://m.media-amazon.com/images/I/61ja5aV3s9L.jpg)
![Rear Derailleur, Huazu Bike Parts Gear Shifter for RD-TZ31-A with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles - Image 3](https://m.media-amazon.com/images/I/716WAnotFFL.jpg)
![Rear Derailleur, Huazu Bike Parts Gear Shifter for RD-TZ31-A with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles - Image 4](https://m.media-amazon.com/images/I/61h-LVVrOUL.jpg)
![Rear Derailleur, Huazu Bike Parts Gear Shifter for RD-TZ31-A with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles - Image 5](https://m.media-amazon.com/images/I/613AeawjxwL.jpg)

## Available Options

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

## Questions & Answers

**Q: Does it work with mongoose R4050WM 21 speed mountain bike?**
A: I used it on my teens mongoose, unsure of the model, but I would think so?

**Q: Does it work for a 21 speed bike?**
A: Yes, we used it for a 21 Speed Mongoose bike

## Frequently Bought Together

- Rear Derailleur, Huazu Bike Parts Gear Shifter for RD-TZ31-A with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles
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- FGBNM Single/6/7/8/9/10/11/12 Speed Bike Chain, Bike Chain for Road Mountain Racing Cycling

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**Shop now:** [https://www.desertcart.pt/products/451202909-rear-derailleur-huazu-bike-parts-gear-shifter-for-rd-tz31](https://www.desertcart.pt/products/451202909-rear-derailleur-huazu-bike-parts-gear-shifter-for-rd-tz31)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-01-23*