"Ton" designations on modern pickups are merely monikers assigned by the various manufacturers to designate the intended use. If taken literally as carrying capacities nothing will make sense. Basically the new '07 Tundra is what I would refer to as a heavy-duty 1/2 ton. However the State of Texas disagrees and calls my Tundra a 3/4 ton on the title. I know another TS poster in Texas has a title that says 3/4 ton also. In the murky waters of classical tonnage designations the computers at some Texas county tax offices can't deal with the new Tundra's empty vs. gross weight numbers, yielding the 3/4 ton designation. The rear springs on the tundra are not as stiff as traditional 3/4 ton trucks so we've got a real animal of a vehicle that falls somewhere in between (which I think is perfect).