We focused on children's safety so that the bearing doesn't break easily.<br> COMPATIBLE WITH MOST KIDS BICYCLE: Training wheels for girl and boy are available for 12, 14, 16, 18, 20 inch bikes, But the HUFFY kids bike is .<br> FLASH LIGHTS :Wheels light up when they spin above 1m/s smoothly, creating much fun and kids can ride in dark environment.<br> DURABLE PU:The bicycle training wheels are made of high quality PU and plastic with extra thickness which is anti-slippery and wear resistant. It creates a condition for kids to ride without fears.<br> For children's safety, we upgraded durability over other products.<br> You can see the difference if you compare it directly with other products and photos.<br> We have upgraded the wheel design and bearings.<br> Let the kids enjoy riding their bikes with the LED light from the .<br> Training wheels are essential for children to learn how to ride safely.<br> memories about bicycles to your children.<br> Colour: Black<br> Material: metal +PU<br> Package Contents:<br> 2 x LED wheels<br> 2 sets x installation accessories<br> 2 x wheel mounting brackets<br> Only the above package content, other products are not included.<br> Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.