Light and sturdy: The aluminum frame of the Wahoo is robust and durable, yet still light enough to be easily controlled by children. The closed dropouts with Trek's ThruSkew axle prevent the wheels from accidentally falling out. A straightforward 1x8 drivetrain simplifies gear shifts so your little ones can focus on the fun of riding. Trek's children's bikes are an investment in quality because they are built with just as much care as the adult Trek bikes.