Four wheel sizes share one kids bicycle platform, each with an adjustable handlebar and saddle so riders can match seat height and reach as they grow. On the 18-inch version, the 49.5 x 21 x 31-in frame and 9 x 6.5-in saddle size give room for older kids within the stated height range. The seat supports up to 145 lbs, and a fully enclosed chain guard keeps moving parts covered. A dual brake system with handbrake and rear coaster brake, plus two removable training wheels, helps kids control speed and balance on paved surfaces.