The FirstBike Track Balance Bike is a state of the art bicycle that will grow with your little one! This fantastic buy has an adjustable seat- easily change the seat height by just turning the knob! The optional lowering kit available adjusts the seat to a lower height making it ideal for small children to ride. The knob and the optional lowering kit allow children between the ages of 22 months to 5 years of age to enjoy their bicycle for years. The bike comes with hard rubber low resistance tires, a soft rubber seat and hand grips, and front and rear splash guards. This lightweight composite frame bicycle is rust and insect proof and assembles in minutes! The hassle-free, safe, and fun FirstBike Track Balance Bike will become your childs favorite!