The Razor Dirt Rocket MX500 is a bigger and faster version of the MX350 and is perfect for ages 14 and up. The Razor MX500 carries riders up to 175 pounds at speeds up to 17 mph and is equipped with large 14" and 16" pneumatic knobby tires for maximum power transfer.Read and understand the enclosed owner's manual before riding. Safety equipment such as a helmet, elbow and knee pads are recommended. Use this product only in controlled environments free of potential traffic hazards and not on pub...