---
product_id: 224071370
title: "lundeng OEM RD-TZ31 6/7 Speed Rear Derailleur Direct Mount for Mountain Bike"
brand: "lundeng"
price: "$96"
currency: NZD
in_stock: true
reviews_count: 8
url: https://www.desertcart.nz/products/224071370-lundeng-oem-rd-tz31-6-7-speed-rear-derailleur-direct
store_origin: NZ
region: New Zealand
---

# Direct mount design 6/7 speed compatibility Durable alloy & plastic build lundeng OEM RD-TZ31 6/7 Speed Rear Derailleur Direct Mount for Mountain Bike

**Brand:** lundeng
**Price:** $96
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift into the fast lane—gear up like a pro!

## Quick Answers

- **What is this?** lundeng OEM RD-TZ31 6/7 Speed Rear Derailleur Direct Mount for Mountain Bike by lundeng
- **How much does it cost?** $96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/224071370-lundeng-oem-rd-tz31-6-7-speed-rear-derailleur-direct)

## Best For

- lundeng enthusiasts

## Why This Product

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

## Key Features

- • **Direct Mount Convenience:** Easy installation with direct mount design—no hub bolt hassle, just ride.
- • **Seamless 6/7 Speed Shifting:** Optimized for smooth, precise gear changes on both mountain and road bikes.
- • **SIS Index Shift Compatibility:** Compatible with Shimano’s SIS indexing for reliable, crisp gear transitions.
- • **Universal Fit for Aluminum Frames:** Perfectly tailored for aluminum alloy bike frames, ensuring a secure fit every time.
- • **Robust Alloy & Plastic Construction:** Engineered for durability and lightweight performance on rugged trails.

## Overview

The Lundeng OEM RD-TZ31 is a high-quality 6/7 speed rear derailleur designed for direct mount installation on mountain and road bikes. Crafted from durable alloy and plastic, it fits aluminum alloy frames and supports Shimano SIS indexed shifting for smooth, reliable gear changes.

## Description

Model: Shimano RD-TZ31, the latest version of RD-TZ30, it is exactly same size and type of RD-TZ30 Color: Black Weight: about 300g/pc This model has 2 types, Direct Mount or Hub Bolt Mount (Hanger Mount), how to choose the Direct Mount or Hanger Mount? The Direct Mount which bolts directly to frame, if there is a dropout on your bike, you need Direct Mount. If the "claw" type has a "C" shaped hook which goes around the solid axle, you need Hanger Mount.

## Features

- Shimano RD-TZ31 6/7 Speed Rear Derailleur Direct Mount For Mountain Bike
- This is Direct Mount type, NOT hub bolt mount type，Material: High quality plastic and alloy
- For 6/7 grade freewheel, SIS index shift, fit for mountain bike/road bike
- Mainly used in aluminum alloy bike frame
- NOTE: Please check the mount type of your original part before buying, if bike frame with hook, as picture shows, you can use it

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Number of Teeth | 12 |
| Manufacturer | Lundeng |
| Item Package Dimensions L x W x H | 5.2 x 4.65 x 2.24 inches |
| Package Weight | 0.26 Kilograms |
| Brand Name | lundeng |
| Part Number | RD-TZ31 |
| Size | 1 Set |

## Product Details

- **Brand:** lundeng
- **Color:** Black
- **Material:** Alloy, possibly aluminum
- **Case Material:** Aluminum
- **Mounting Type:** Braze-On Mount

## Images

![lundeng OEM RD-TZ31 6/7 Speed Rear Derailleur Direct Mount for Mountain Bike - Image 1](https://m.media-amazon.com/images/I/71Jdx8EnnAL.jpg)

## Questions & Answers

**Q: Have an ultus on an old schwinn voyager 12 speed will it work?**
A: You need to check a couple of things to find out if this will work.  One, the mounting , Will it go onto my bike. Two, the length of the idler cage, Short or Long.  Once you determine these I can see no reason it should work.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Reliable and Affordable - Lundeng OEM RD-TZ31 Rear Derailleur
*by S***M on August 5, 2023*

He Lundeng OEM RD-TZ31 6/7 Speed Rear Derailleur is a budget-friendly option for mountain bikers seeking a practical and reliable gear-shifting solution. I've had the opportunity to test this rear derailleur on my mountain bike, and in this review, I'll share my thoughts on its performance, installation process, and overall value.Performance on the Trails:The Lundeng RD-TZ31 rear derailleur offers a satisfactory level of performance for its price point. While it may not rival the precision and smoothness of higher-end models, it adequately handles gear changes and adjustments for six or 7-speed drivetrains. During my trail rides, the derailleur reliably shifted through the gears, ensuring a consistent and hassle-free riding experience. However, riders seeking top-tier performance and lightning-fast shifts may want more.Installation and Compatibility:Installing the Lundeng RD-TZ31 rear derailleur was straightforward, thanks to its direct mount design. The derailleur aligned well with my mountain bike's frame and integrated seamlessly with the existing drivetrain components. It's worth noting that this derailleur is designed explicitly for 6/7-speed setups, so it's essential to ensure compatibility with your bike's gear range before purchasing.Durability and Build Quality:Considering its affordability, the build quality of the Lundeng RD-TZ31 is acceptable. The materials are decent, and the derailleur feels sturdy enough to withstand moderate trail conditions. However, riders who frequently tackle rugged and demanding terrains might want to invest in a more robust, higher-end derailleur for enhanced longevity.The smoothness of Operation:The shifting action of the Lundeng RD-TZ31 is relatively smooth, though more refined than some premium options. It may require occasional adjustments to maintain optimal shifting performance. While it doesn't offer lightning-fast shifts, it gets the job done and keeps you moving on the trails.Value for Money:Undoubtedly, the Lundeng OEM RD-TZ31 rear derailleur shines regarding value for money. For budget-conscious mountain bikers or beginners, this derailleur provides a cost-effective way to upgrade or replace an existing component without breaking the bank.Conclusion:In conclusion, the Lundeng OEM RD-TZ31 6/7 Speed Rear Derailleur is a commendable option for riders seeking an affordable and reliable gear-shifting solution for their mountain bikes. While it may offer a different level of performance and durability than higher-priced alternatives, it gets the job done adequately for its intended purpose. If you want to make a budget-friendly upgrade or replacement, the Lundeng RD-TZ31 is worth considering. Just be mindful of its limitations and adjust your expectations accordingly, and you'll find it a practical addition to your mountain biking adventures.

### ⭐⭐⭐⭐⭐ Bike
*by B***N on March 9, 2023*

Was able to fix a bike with this part.

### ⭐⭐⭐⭐ the arm wasnt long enough for my bike.
*by W***E on July 16, 2022*

It hit the big sprocket. But got refunded when contacting seller.

## Frequently Bought Together

- lundeng OEM RD-TZ31 6/7 Speed Rear Derailleur Direct Mount for Mountain Bike
- EBIKELING 7-Speed Bicycle Bike Freewheel Cassette Gear 14-28 ebike

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.nz/products/224071370-lundeng-oem-rd-tz31-6-7-speed-rear-derailleur-direct](https://www.desertcart.nz/products/224071370-lundeng-oem-rd-tz31-6-7-speed-rear-derailleur-direct)

---

*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-21*