Smart Start design features a durable steel frame and kid-specific proportions for easier pedaling and handling. Includes both rear coaster break and front caliper brake; easing the transition to a bigger, hand-brake-only bike when they’re ready. Full coverage chain guard to protect little hands, feet, and clothing. Fits children who are 48-60 inches tall. Adjustable saddle and a slack seat-tube angle allow the bike to grow with your child.