Universal Compatibility: Designed to fit most children's glider bikes, training bicycles, and balance bikes with a 12-inch wheel size, ensuring a versatile replacement option Reinforced Nylon Hubs: Sturdy and long-lasting hubs provide durability and resist breaking during extended use Quiet Design: Engineered for silent operation, these wheels reduce rolling noise for a smoother and more comfortable riding experience Easy Installation: Simple replacement process with no professional tools required, allowing parents to install conveniently Complete Set: Includes a pair of balance bike replacement wheels, ideal for refreshing or upgrading your child's bike Specification: Material: Metal and Plastic Size Chart: Diameter: 30 cm / 11.81 inches Width: 4.5 cm / 1.77 inches Package Includes: 1 Pair Balance Bike Replacement Wheels Note: Please allow slight variations of 1–2 cm / 0.39–0.79 inches due to manual measurement