Cummins ISM 6 Cylinder 10.8 L Ultra Low Sulfur Diesel Engine, Air Conditioner, Manual Transmission, Double Differential Locks, 23000 lb Front Axle, 46000 lb Rears, 69000 lb GVWR, Air Ride Cab, Aluminum Front Wheels, 445/65R22.5 Front Tires, 12R22.5 Rear Tires, Chalmers Rubber over Walking Beam Suspension, 212 in Wheelbase, McNeilus 10.5 cyd Mixer Unit, 3 Removable Chutes