Build riding confidence on a 12 inch balance bike with an aviation-grade magnesium alloy frame weighing just 8 lbs. Five-layer pneumatic tires absorb shocks on pavement and gravel. The seat adjusts 2.5 inches from 15.5 to 18 inches while 360-degree handlebar rotation enables sharp turns. Footrests allow comfortable leg positioning. Astm and Cpsia certified with 95 percent pre-assembly.