Hi. Our 6x6 is 3.8 tons empty. When I went to Perth it was up near 5 tons maybe a bit more. It is the drag of the 15" that you notice when you push the clutch in & coast from about 90ks. The vehicle slows down much faster than it does with the 16". Plus the revs at 100kph have dropped about 150 to 200rpm. Paul

