Four wheel sizes are available so you can choose the 16-inch kids bicycle that matches your child’s 41.3-51.2 in height range and 4-7 years age range. The 44.5 x 21.5 x 31.5 in frame uses an adjustable seat and handlebar so the fit can change as kids grow. A fully enclosed chain guard helps keep fingers and clothing away from moving parts while riding. The dual brake system combines a handbrake with a rear coaster brake for controlled stopping. Removable training wheels, anti-slip pedals and a 110-lb seat capacity support balance and confident practice on cement, boardwalks or asphalt roads.