--- product_id: 512130573 title: "Black/Sliver Rear Derailleur RD-TY21B 6/7 Speed Direct Mount/Hanger Mount for Mountain Bike Kids Commuter Bike" brand: "rainflowwer" price: "€ 41.57" currency: EUR in_stock: false reviews_count: 8 url: https://www.desertcart.com.cy/products/512130573-black-sliver-rear-derailleur-rd-ty21b-6-7-speed-direct store_origin: CY region: Cyprus --- # Durable aluminum alloy build Hanger mount design 6/7 speed compatibility Black/Sliver Rear Derailleur RD-TY21B 6/7 Speed Direct Mount/Hanger Mount for Mountain Bike Kids Commuter Bike **Brand:** rainflowwer **Price:** € 41.57 **Availability:** ❌ Out of Stock ## Summary > 🚴‍♂️ Shift into the future with precision and style! ## Quick Answers - **What is this?** Black/Sliver Rear Derailleur RD-TY21B 6/7 Speed Direct Mount/Hanger Mount for Mountain Bike Kids Commuter Bike by rainflowwer - **How much does it cost?** € 41.57 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/512130573-black-sliver-rear-derailleur-rd-ty21b-6-7-speed-direct) ## Best For - rainflowwer enthusiasts ## Why This Product - Trusted rainflowwer brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Universal Hanger Mount Fit:** Easy installation on most mountain, commuter, and road bikes. - • **Seamless 6/7 Speed Shifting:** Optimized for smooth, precise gear changes on diverse terrains. - • **Pro-Grade Performance with Support:** Backed by expert customer service for worry-free cycling. - • **Robust Aluminum Alloy Construction:** Engineered for durability and long-lasting ride stability. - • **Versatile Multi-Bike Compatibility:** Perfect for mountain, city, folding, and racing bikes alike. ## Overview The RainFlowwer RD-TY21B rear derailleur is a durable, aluminum alloy component designed for 6 and 7 speed bikes. Featuring a hanger mount, it fits a wide range of bicycles including mountain, commuter, and road bikes, delivering reliable and smooth gear shifting for an enhanced cycling experience. ## Description Black/Sliver Rear Derailleur RD-TY21B 6/7 Speed Direct Mount/Hanger Mount for Mountain Bike Kids Commuter Bike ## Features - MODEL: Bicycle rear derailleur RD-TY21B, suitable for 6 and 7 speed SIS index variable speed drives - Note: The bike rear derailleur is hanger mount , not direct mount. Please check the mount way before you purchase. - MATERIAL: Made of durable aluminum alloy material, which ensures your safe and stable on the ride, not easily deformed and pretty solid. - WIDE APPLICATION: This bicycle transmission is suitable for variable speed bikes, mountain bikes, road bikes, bicycle racing, city bikes, folding bikes, etc.It is your indispensable bicycle accessories during your cycling journey. - Important: If you have any questions, please feel free to contact us, we will provide you with professional services. ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | RainFlowwer | | Item Package Dimensions L x W x H | 5.79 x 4.49 x 3.43 inches | | Package Weight | 0.32 Kilograms | | Brand Name | RainFlowwer | | Warranty Description | 1 month | | Model Name | rear-bike-derailleurs | | Suggested Users | unisex-adult | | Part Number | 3 | | Included Components | rear derailleurs | | Size | One Size | ## Product Details - **Brand:** RainFlowwer - **Color:** RDTY21B/Hanger Mount-Black - **Material:** Metal - **Item Weight:** 0.32 Kilograms - **Mounting Type:** Hanger Mount ## Images ![Black/Sliver Rear Derailleur RD-TY21B 6/7 Speed Direct Mount/Hanger Mount for Mountain Bike Kids Commuter Bike - Image 1](https://m.media-amazon.com/images/I/617q8JL9rhL.jpg) ![Black/Sliver Rear Derailleur RD-TY21B 6/7 Speed Direct Mount/Hanger Mount for Mountain Bike Kids Commuter Bike - Image 2](https://m.media-amazon.com/images/I/616NbKR8jIL.jpg) ![Black/Sliver Rear Derailleur RD-TY21B 6/7 Speed Direct Mount/Hanger Mount for Mountain Bike Kids Commuter Bike - Image 3](https://m.media-amazon.com/images/I/61BS828H9qL.jpg) ![Black/Sliver Rear Derailleur RD-TY21B 6/7 Speed Direct Mount/Hanger Mount for Mountain Bike Kids Commuter Bike - Image 4](https://m.media-amazon.com/images/I/71Rd05yg6ZL.jpg) ![Black/Sliver Rear Derailleur RD-TY21B 6/7 Speed Direct Mount/Hanger Mount for Mountain Bike Kids Commuter Bike - Image 5](https://m.media-amazon.com/images/I/61a4Bq0TgvL.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works good great price. *by C***S on November 19, 2024* Nice Derailleur. Works well on my mountain bike. I had installed a different rear sprocket pack that had very low ratio for first gear (Large diameter) and needed a derailleur that would take up the extra slack. This worked very well. ### ⭐⭐⭐⭐⭐ nice fit *by C***R on February 2, 2024* direct replacement ### ⭐⭐⭐⭐ Works great *by E***. on March 10, 2025* Good quality for the price barrel adjuster a little stiff and hard to turn but functional cable pincher nut came unattached other wise works great ## Frequently Bought Together - Black/Sliver Rear Derailleur RD-TY21B 6/7 Speed Direct Mount/Hanger Mount Rear Derailleur for Mountain Bike Kids Bike Commuter Bike - 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) - Bicycle Front Derailleur FD-TY300 3 x 6/7 Speed Up/Down Swing, Bike Derailleur 3 Speed with Adjust Clamp Size 31.8mm 34.9mm for Mountain Bike Road Bicycle --- ## 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.com.cy/products/512130573-black-sliver-rear-derailleur-rd-ty21b-6-7-speed-direct](https://www.desertcart.com.cy/products/512130573-black-sliver-rear-derailleur-rd-ty21b-6-7-speed-direct) --- *Product available on Desertcart Cyprus* *Store origin: CY* *Last updated: 2026-04-24*