Designed for beginner bike practice to help learners develop a sense of balance on the bike. Improve your child's safety and confidence High quality ABS wheels and bracket arms made of high quality steel. Our supporting arms for supporting wheels have a thickness of 3.0 mm. For beginners this means more safety and stability The wheels are suitable for most 12-20 inch single speed bikes with horizontal rear tie rod ends The training wheels are made of high quality rubber and provide the necessary safety and stability. With really big wheels, every kind of bike looks fantastic, stylish and beautiful These wheels are individually adjustable and easy to install. If you have questions about this article, feel free to contact us.