Abstract: A wheeled industrial/agricultural tractor adapted for use as, for example, an aircraft tug. The tractor has an equipment support frame (3, 28) in the form of a heavy base plate (3) carried beneath an operator's station portion of a conventional tractor chassis (50, 10, 51, 52, 53) and a pair of transversely spaced struts (28) secured (25) to the front portion of the base plate (3) and arranged to extend forwardly thereof. The front ends of the struts have attachment means (19, 28a) for the support of equipment, such as a towing hitch (20), at the front of the tractor. First (1, 2, 70) and second (27, 29, 28c, 28d) attachment means are provided for respectively securing the base plate and struts to the chassis. The tractor also has an engine installation (10, 12, 13, 14) which allows downwardly sloping body panelling (16) at the front to improve vision of the front mounted equipment (20).