TOYOTA 2011 Tundra - Manual (Page 299)

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2-5. Driving information
2
Wh
en drivin
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Trailer Tongue Weight and Trailer Kingpin Weight
l A recommended tongue weight or kingpin weight varies in accor-
dance with the types of trailers or towing as described below.
l To ensure the recommended values shown below, the trailer must
be loaded by referring to the following instructions.
1. Conventional Towing
The gross trailer weight should be distributed so that the tongue
weight is 9% to 11%. (Tongue Weight/Gross trailer weight x 100
= 9% to 11%)
Gross trailer weight
Tongue Weight
If using a weight distributing hitch when towing, return the front
axle to the same weight as before the trailer connection.
If front axle weight cannot be measured directly, measure the
front fender height above the front axle before connection.
Adjust weight distributing hitch torque until front fender is
returned to the same height as before connection.
Do not reduce front fender height below original measurement.
The gross trailer weight, gross axle weight and tongue weight
can be measured with platform scales found at a highway
weighing station, building supply company, trucking company,
junk yard, etc.