Help with tow rating for 2011 Toyota tundra and new TT

As far as having to subtract for passengers and hitch, that doesn't fully apply to the Tundra or any truck that uses J2807.

The engineering standards allow for two 150# passengers, I know many of us weigh a touch more, and I believe 70# for the hitch.

Those ratings also allow a dually to be just a little slower in acceleration and climbing than single rear wheel trucks.