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 durable construction ensures long-lasting performance and resistance to breakage 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 need for professional tools, allowing parents to install them quickly and easily Complete Set: Includes a pair of balance bike replacement wheels, ideal for refreshing or upgrading your child's bike Specifications: Material: Metal and Plastic Diameter: 30 cm (11.81 inches) Width: 4.5 cm (1.77 inches) Package Includes: 1 Pair of Balance Bike Replacement Wheels Note: Please allow slight measurement deviations of 1–2 cm (0.39–0.79 inches) due to manual measurement processes