Razor MX400 Dirt Rocket 24V Electric Toy Motocross Motorcycle Dirt Bike At Speeds up to 14mph, the MX400 leaves similar pocket dirt bikes in its dust! Geared for dirt with large 12&#8243; pneumatic knobby tires for maximum power transfer Single speed, chain driven motor for super quiet, yet powerful operation Scaled down dirt bike design carries riders up to 140LBS Recommended for ages 13 and older