Key benefits Thickened PU wheel provides improved shock absorption for a smoother, more comfortable ride on uneven surfaces. 2.5 cm wheel thickness reduces bumps and requires less effort to ride, enhancing overall comfort. Compatibility and fit Universal mounting: wheel comes with a bracket attached and a fivehole pattern to fit bikes with wheel sizes 12, 14, 16, 18, and 20 inches. Appearance: round and colorful design that appeals to kids. Not compatible with variablespeed bicycles. Durability and safety Double carbon steel core for increased strength and longer life. Enlarged washer design provides full coverage and a secure fit, helping prevent wheel loosening or detachment during use. Specifications at a glance Material: PU wheel with steel core; enlarged washer for secure mounting Thickness: 2.5 cm Compatibility: works with 12, 14, 16, 18, 20 inch bicycles Color/style: round and colorful, kidfriendly Practical use scenarios Replacing worn wheels on a child's 12–20 inch bike to restore a smooth, comfortable ride on sidewalks and rougher paths. Upgrading wheels on kids' bikes used for daily commuting or park outings, providing better shock absorption and easier handling. School or community programs that require durable, easytomount wheels for a range of small bicycles. Installation notes Attach the wheel using the bracket with five holes to fit the specified bike sizes; ensure all fasteners are securely tightened before riding. This product is not suitable for variablespeed bicycles. Regularly check the washer and mounting points for security.