Kids Bike Stabilizers: Children's safety is the most important thing. Our bike stabilizers weigh 1.1 kg. Heavy-duty training wheels help children maintain balance and provide increased safety and stability. Robust and Durable: The upgraded version of thick 3mm high-strength carbon steel material, stable riding 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. Bike Stabilizers 18 20 22 24 Inch: Bike stabilizers are suitable for 18 20 22 24 inch bikes, meeting children's needs to learn to ride a bike during different periods and providing them with safe support. Enjoy the fun of cycling. Compatibility: Bike stabilizers are suitable for children's bikes and bikes with gears. Install our special extension screws on the gear side. After installation, make sure the main wheel is perpendicular to the ground and confirm that the training wheels on both sides have a height of about 0.6-1 cm from the ground. (Installation tools provided by yourself)