1. Material of the secondary wheel: The main body of the secondary wheel is made of PU material, which has high wear resistance and will not be excessively worn even if riding for a long time. 2. Product description: The principle of the luminous wheel is that the built-in micro-generator rotates to generate electricity, and the light will light up (no battery is required). 3. Anti-slip: Our children's bicycle training wheels have an anti-slip function, making riding safer and easier. Your child will ride more smoothly and you can learn to ride a bicycle with confidence. 4. Support process: The support adopts a multi-layer baking paint process, the surface is smooth and burr-free, and it is not easy to hurt your hands during installation. 5. Easy to install: Our bicycle training wheels can be quickly and easily installed on your children's bicycle. Just install it and your child can ride!