Schwinn Balance Bike, 12" Wheels, Multiple Colors The Schwinn Balance Bike is designed with a BMX look and a steel frameits pedal-free, low center of gravity makes it easy to ride and perfect for young riders. With an adjustable, quick-release seat collar, this kid's bike is designed to grow with your little one as they learn to balance. The 12-inch spoked mag wheels are made with air-filled tires. A ball bearing headset allows for easy steering with chrome-finished handle bars. This kid's bike ships ready to be assembled, with a limited lifetime warranty, and the wheels measure 12 inches. Designed for kids ages two to four.