Designed for kids aged 3-12, this Electric Dirt Bike for Kids comes with a 300W engine that provides constant power, and the maximum load capacity is 143 pounds. (Data may vary depending on factors like speed mode, weight load, battery, temperature, road conditions, etc.)EV12M Electric Dirt Bike's powerful 36V engine allows it to reach a top speed of 15.5 Mph (25KM/H). The 4AH ultra-long battery life offers fully charged mileage of up to 9.3 miles. (The Electric Motorcycle also features three adjustable speed modes - 5 Mph, 7.5 Mph, and 15.5 Mph.)