Light and sturdy: The aluminum frame of the Wahoo is durable and long-lasting, yet lightweight enough to be easily controlled by children.; The closed dropouts with Treks ThruSkew axle prevent accidental falling out of the wheels.; An uncomplicated 1x8 drivetrain simplifies gear shifting, allowing your offspring to focus on the joy of riding.; Children's bicycles from Trek are an investment in quality - because they are built with the same care as the adult Trek bikes.