Air in the tires is what separates this kids tricycle from the hard plastic version: a 15-in inflatable front wheel rolls over lawn ruts, sidewalk lips, and driveway seams instead of transmitting every bump to a rider. The carbon steel frame runs in a triangle for stiffness and carries a 200 lbs maximum load. Both the handlebar and the seat rise, and the saddle spans 18 to 21 in, so the trike keeps fitting a child up to 4.6 ft tall.