Abstract: A high crop agricultural vehicle has a chassis supported at an elevated position on front and rear sets of wheels. The front wheels are turnable through an arc of greater than 90.degree. so that they can be turned to a lateral travel position which is perpendicular to the direction of normal forward travel. In that lateral travel position the vehicle can be driven sideways. This allows the vehicle to be easily manoeuvred as well as facilitating the mounting of agricultural implements into the space between the front and rear wheels. The rear wheels are preferably momented in a castor-type mounting assembly.