20PCS 20mm Plastic Mini Wheels for DIY Model Cars & STEM Projects
20PCS 20mm Plastic Mini Wheels for DIY Model Cars & STEM Projects
20PCS 20mm Plastic Mini Toy Wheels – Perfect for DIY Science Models & Mini Car Builds
Bring your creative builds to life with these versatile 20mm plastic mini wheels! Whether you're assembling a science fair project, a classroom robot, or a custom DIY toy car, these compact wheels deliver smooth, reliable rolling performance in a lightweight plastic design. Each pack includes 20 wheels — plenty to power multiple projects at once.
Designed with a 1.9mm axle hole that snugly fits a standard 2mm shaft, these wheels attach securely without wobbling, giving your model vehicles a clean, finished look. The flat, round profile and consistent 6.7mm thickness ensure uniform rolling across flat surfaces.
Made in Mainland China.
Key Specifications
- Material: Durable Plastic
- Wheel Diameter: 20mm
- Wheel Thickness: 6.7mm
- Axle Hole: 1.9mm (compatible with 2mm shaft/axle)
- Quantity: 20 wheels per pack
Why You'll Love These Mini Wheels
- ✅ Great for STEM & DIY Projects — Ideal for school science projects, robotics, and homemade toy cars
- ✅ Uniform Size & Shape — Consistent 20mm diameter ensures balanced, even rolling
- ✅ Lightweight Plastic Construction — Easy to work with, cut, or glue as needed
- ✅ Snug Axle Fit — 1.9mm hole fits 2mm shafts for a secure, wobble-free connection
- ✅ Pack of 20 — Enough wheels to complete multiple projects or keep extras on hand
What's Included
- 20 × 20mm Plastic Toy Wheels
Important Notes
- Due to lighting and monitor variations, the actual color may differ slightly from product images.
- Please allow a tolerance of 1mm–1cm due to manual measurement.
- Use a 2mm axle/shaft for optimal fit with the 1.9mm axle hole.
For more information on STEM education and the benefits of hands-on model building for learning, visit the U.S. Consumer Product Safety Commission (CPSC) for safety guidelines on toy components and educational supplies.
Frequently Asked Questions
Q: What size axle or shaft do these 20mm plastic wheels fit?
A: These mini plastic wheels have a 1.9mm axle hole, designed to work best with a standard 2mm shaft or axle. This snug fit keeps the wheel securely in place without excessive wobbling during use.
Q: Are these wheels suitable for school science and STEM projects?
A: Absolutely! These 20mm plastic toy wheels are a popular choice for science fair models, DIY robot builds, classroom engineering challenges, and homemade toy car projects. Their lightweight plastic construction makes them easy to handle and incorporate into a wide variety of creative builds.
Q: How many wheels come in one pack?
A: Each pack contains 20 plastic mini wheels, giving you enough to complete multiple model car or science project builds, with extras to spare for future use.