Huffy Pro Thunder 20" Boys' BMX Bicycle Bike Type: Kids Bike--Specifically designed for young children who are new to riding. Bike Frame Material: Steel --A strong and durable material that will last. Fork Type: Rigid--Increases the feel and response of the bike. Handle Bars: BMX--Low profile BMX bars that offer you stability and great maneuverability. Free Wheel Hub--Allows you to pedal backwards without the brakes engaging.