2011 Toyota Tundra Double Cab Owners Manual - Page 304

2-5. Driving information 2. Fifth wheel Towing or Gooseneck Towing The gross trailer weight should be distributed so that the kingpin weight is 19% to 21%. (Kingpin weight/Gross trailer weight x 100 = 15% to 21%) Gross trailer weight Kingpin weight The gross trailer weight and kingpin weight can be measured with platform scales found at a highway weighing station, building supply company, trucking company, junk yard, etc. CrewMax models: Current fifth wheel trailer designs are not compatible with short bed. 276