--- product_id: 430704734 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: "VT7144" currency: VUV in_stock: true reviews_count: 11 category: "Huazu" url: https://www.desertcart.vu/products/430704734-rear-derailleur-huazu-bike-parts-gear-shifter-for-rd-tz31 store_origin: VU region: Vanuatu --- # Direct braze-on mount 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:** VT7144 **Availability:** ✅ In Stock ## Summary > 🚴‍♂️ Shift Smooth, Ride Bold: Elevate Every Mile with Huazu Precision! ## 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?** VT7144 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/430704734-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 - • **Lightweight Yet Durable:** Crafted from premium aluminum alloy for long-lasting performance without the bulk. - • **Wide Gear Range Capacity:** Supports up to 34T total capacity with sprockets from 14T to 28T for versatile terrain mastery. - • **Robust Direct Mount Design:** Braze-on mount ensures a secure fit and easy installation—no hub bolt hassle. - • **Trusted by Riders Worldwide:** Top-rated with 4.3 stars and a #2 rank in rear derailleurs—join the community of confident cyclists. - • **Precision 6/7 Speed Shifting:** Seamlessly compatible with GS 6/7 speed SIS drivetrains for flawless gear transitions. ## Overview The Huazu RD-TZ31-A Rear Derailleur is a high-performance, direct braze-on mount gear shifter designed for 6 and 7-speed mountain bikes. Made from durable aluminum alloy, it offers reliable, smooth shifting across a wide gear range (14T-28T sprockets) and supports a total capacity of 34T. Lightweight and easy to install, this derailleur is a top-rated choice for riders seeking stable, precise drivetrain performance. ## Description desertcart.com : Huazu Rear Derailleur for RD-TZ31-A, Bike Parts Gear Shifter with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles : Sports & Outdoors Review: Solid for the price - Setup was simple, no hassle. Shifts clean and hasn’t given me any issues so far, even on bumpy rides. For the price, it’s a really good replacement. Review: Smooth Operation - Replaced a broken gear for a child at a charity. Nice price and easy to install if you know what you are doing. Hardest part is opening the chain to put it on. Worked smoothly- happy child has his bike back! Comes with everyhting to repair a broken gear. ## 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 | |---------------|-------| | ASIN | B09WRBHZNT | | Best Sellers Rank | #14,029 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #2 in Rear Bike Derailleurs | | Brand Name | Huazu | | Case Material Type | Aluminum | | Color | Black | | Customer Reviews | 4.3 4.3 out of 5 stars (503) | | Item Dimensions L x W x H | 5.11"L x 3.94"W x 1.57"H | | Item Weight | 0.28 Kilograms | | Manufacturer | Huazu | | Manufacturer Part Number | RDTZ31A | | Material Type | Aluminum | | Model Number | RDTZ31A | | Mount Type | Braze-On Mount | | Number of Teeth | 28 | | UPC | 731235765869 | | Warranty Description | 1 Year | ## Product Details - **Brand:** Huazu - **Color:** Black - **Item Weight:** 0.28 Kilograms - **Material:** Aluminum - **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) ## Available Options This product comes in different **Item Display 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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Solid for the price *by M***W on March 25, 2026* Setup was simple, no hassle. Shifts clean and hasn’t given me any issues so far, even on bumpy rides. For the price, it’s a really good replacement. ### ⭐⭐⭐⭐⭐ Smooth Operation *by D***O on December 29, 2025* Replaced a broken gear for a child at a charity. Nice price and easy to install if you know what you are doing. Hardest part is opening the chain to put it on. Worked smoothly- happy child has his bike back! Comes with everyhting to repair a broken gear. ### ⭐⭐⭐⭐⭐ Good quality *by E***Z on January 25, 2026* So far everything looks durable, my son installing it on his bike. Thank you ## 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 - Bike Chain Kit, Single/6/7/8/9/10/11/12 Speed Multi-Function Bike Mechanic Repair Kit, Chain Breaker and Bike Link Plier with Hook and 6 Pairs Bicycle Buckle, Reusable (6/7/8 Speed Bike Chain Kit) - FGBNM Single/6/7/8/9/10/11/12 Speed Bike Chain, Bike Chain for Road Mountain Racing Cycling --- ## 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.vu/products/430704734-rear-derailleur-huazu-bike-parts-gear-shifter-for-rd-tz31](https://www.desertcart.vu/products/430704734-rear-derailleur-huazu-bike-parts-gear-shifter-for-rd-tz31) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-12*