--- product_id: 5791670 title: "Mini Motor Multi Ratio Gearbox 12-Speed" brand: "tamiya" price: "¥4721" currency: JPY in_stock: true reviews_count: 8 category: "Tamiya" url: https://www.desertcart.jp/products/5791670-mini-motor-multi-ratio-gearbox-12-speed store_origin: JP region: Japan --- # Compact 30x17x31mm size 3.0V motor at 8400RPM 12-speed gear ratios Mini Motor Multi Ratio Gearbox 12-Speed **Brand:** tamiya **Price:** ¥4721 **Availability:** ✅ In Stock ## Summary > ⚙️ Shift your projects into high gear with precision and style! ## Quick Answers - **What is this?** Mini Motor Multi Ratio Gearbox 12-Speed by tamiya - **How much does it cost?** ¥4721 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/5791670-mini-motor-multi-ratio-gearbox-12-speed) ## Best For - tamiya enthusiasts ## Why This Product - Trusted tamiya brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **High-Speed Motor:** Robust 8400RPM motor powered by 3.0V delivers reliable performance for dynamic robotics. - • **Compact Powerhouse:** Sleek 30x17x31mm design fits seamlessly into any build without bulk. - • **Snap & Screw Assembly:** Effortless build with color-molded parts—no paint or glue needed, perfect for quick prototyping. - • **Dual Output Flexibility:** Choose between two output axle positions to optimize your mechanical layout. - • **Precision 12-Speed Control:** Tailor your torque and speed with 12 versatile gear ratios for ultimate project customization. ## Overview The Tamiya Mini Motor Multi Ratio Gearbox 12-Speed is a compact, easy-to-assemble gearbox kit featuring 12 selectable gear ratios and dual output axle options. Powered by a 3.0V, 8400RPM motor, it offers flexible speed and torque control ideal for robotics and model projects. Its snap or screw construction with color-molded parts eliminates the need for paint or glue, making it a perfect hands-on learning tool for gear mechanics. ## Description Tamiya Mini Motor Multi Ratio Gearbox 12-Speed, TAM70190 Review: Great, ok directions - works great i like the fact you can move the one gear into different spots to change the gear ratio, cool way to learn about gear ratios and its effects, make sure you follow the pictures exactly and in correct order, also dont tighten the top lid where you need to use a screw too tight otherwise it will crack a bit like it did for me, but still works mainly visual. Review: Great product Easy to build. - Product arrived in good time and perfect condition. The product was used to add mobility to a 3D printed robot. ## Features - Kit features snap or screw together construction and color molded parts to eliminate needing paint or glue - Dimensions; Width: Approx. 30mm, Height: 17mm, Length: 31mm. - There are two possible output axle locations - The twelve gear ratio options give you the flexibility to choose the best speed and torque for your project. - Motor specifications: 8400RPM, Voltage: 3.0V. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002R0DQD4 | | Best Sellers Rank | #358,469 in Toys & Games ( See Top 100 in Toys & Games ) #241 in RC Vehicle Transmission Gearboxes | | Brand | TAMIYA | | Brand Name | TAMIYA | | Customer Reviews | 4.1 out of 5 stars 133 Reviews | | Item Height | 1.7 centimeters | | Item Weight | 0.15 Pounds | | Manufacturer | Tamiya | | Material | Plastic | | Material Type | Plastic | | Model | 70190-000 | | Model Name | FBA_TAM70190 | | UPC | 885171530552 | | Voltage | 3 Volts | ## Product Details - **Brand:** TAMIYA - **Model Name:** FBA_TAM70190 - **Voltage:** 3 Volts - **Material:** Plastic - **Item Weight:** 0.15 Pounds ## Images ![Mini Motor Multi Ratio Gearbox 12-Speed - Image 1](https://m.media-amazon.com/images/I/719Am8cNN6L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great, ok directions *by D***L on June 29, 2025* works great i like the fact you can move the one gear into different spots to change the gear ratio, cool way to learn about gear ratios and its effects, make sure you follow the pictures exactly and in correct order, also dont tighten the top lid where you need to use a screw too tight otherwise it will crack a bit like it did for me, but still works mainly visual. ### ⭐⭐⭐⭐⭐ Great product Easy to build. *by E***Y on September 6, 2018* Product arrived in good time and perfect condition. The product was used to add mobility to a 3D printed robot. ### ⭐⭐⭐ Wires rip out very easily *by D***M on May 8, 2018* It's okay. powerful for its size, and i like you can change the gear ratios. BUT, i have ordered 2 of these, and both times the wires pulled out of the motor, and it's impossible to solder them back on because the points on the motor are so small. AND, it has very low torque. The electric motor itself is strong, but it doesn't hold power through all the gears (plastic). So ordered a Uxcell gearbox, (a lot of torque, which is what i need) ## Frequently Bought Together - Mini Motor Multi Ratio Gearbox 12-Speed - Tamiya 70168 Double Gearbox - Tamiya 70103 Universal Gearbox Assembly Kit --- ## 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.jp/products/5791670-mini-motor-multi-ratio-gearbox-12-speed](https://www.desertcart.jp/products/5791670-mini-motor-multi-ratio-gearbox-12-speed) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-04-26*