Stabilizers for Children's Bicycle: Child safety is paramount. Our bicycle stabilizers weigh 1.1kg. Heavy-duty training wheels help children maintain balance and provide greater safety and stability. Sturdy and Durable: the upgraded version of thick 3MM high-strength carbon steel material, stable driving without deformation. The wheels are made of environmentally friendly PVC material, non-slip, wear-resistant, durable, and quiet. Easy to Install: Use a wrench to install the training wheel on the bicycle's rear wheel to adjust the distance between the vertical support and the ground. Bicycle Stabilizers 18 20 22 24 Inches: Bicycle stabilizers are suitable for 18 20 22 24 inch bicycles, meeting the needs of children learning to ride during different periods and providing them with safe support. Enjoy the joy of cycling. Compatibility: Bicycle stabilizers are suitable for children's bicycles and variable speed bicycles. Install our special extension screws on the gear side. After installation, make the main wheel perpendicular to the ground and confirm that the auxiliary wheels on both sides have a height of about 0.6-1 cm from the ground. (Installation tools are provided by yourself)