This 18-speed boy's mountain bike is a sturdy choice for both trail and street cycling. The boys bike features a 13-inch (33 cm) frame and 24-inch (60.9 cm) wheels. An index shifter makes changing gears easy. The blue frame includes white and yellow detailing, and wheel reflectors maximize visibility at night. Alloy rims ensure this classic, quality-made boy's mountain bike holds up to rigorous use.