Lightweight 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 shifting, allowing your little ones to fully focus on the path ahead.;Children's bikes from Trek are an investment in quality - as they are built with the same care as the big Trek bikes.