The stroller frame combined with the Feeder Seat is an all-terrain solution. Rear wheels fold for easy storage. Feeder Seat Stroller features include: Seat angle adjust 90° travel position and 120° rest position. Rugged frame and large 12-1/2" pneumatic tires. Extra-Large Feeder Seat features front 5" swivel wheels. Rover stroller frame folds for storage.