The Diamondback Snake B (20") junior mountain bike is designed specifically for the new mountain biker. The lightweight hardtail design, disc brakes, quality Shimano® components and 7 speed drivetrain provide the aspiring rider with a versatile bike that is great for all around riding on a variety of trails and also gets them around the neighborhood in style. This 20” bike is typically for kids between the age of 5 and 8, or 47” to 51” tall. When purchasing a bicycle for your kid, it is important to choose the right size. Your choice should be made considering the size fit, not only the age of your child. In-store sales assistants will help you to make the right choice.