Tulsa city ordinance requires This Machine riders to be 18 or older. However, our bikes are a great option for when your kids have their own bikes and you're looking for a way to ride with them without transporting your own (probably bigger and more cumbersome) bike. This is also a great way to wear kids out- the pedal assist in our bikes boosts your speed to 16mph, so you'll be able to go fast and far without breaking a sweat.