High Tensile Steel Frame 20" Air Tires EZ Fold-up Full chain Guard Front splash guard The WeeRide Co-Pilot is a great way to get children enthusiastic about riding a bike. The Co-Pilot easily attaches onto the seat post of most adult bikes. The universal hitch easily removes for single adult riding. The Co-Pilot helps train children in the concept of riding a bike independently. It is a shared experience with the adult. It enables the child to assist the adult in powering the bike and share the balance. It is held firmly in the upright position and hinges so that cornering is a breeze. The child can use the pedals to push forward but coast when pedals are held stationary or pedaled backwards.