TOYOTA 2011 FJ Cruiser - Manual (Page 218)

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2-5. Driving information
Towing a trailer
Consult your Toyota dealer for further information about additional
requirements such as a towing kits, etc.
Hitch and tow hitch receiver
n Hitch
Trailer hitch assemblies have different weight capacities estab-
lished by the hitch manufacturer. Even though the vehicle may be
rated for towing a higher weight, the operator must never exceed
the maximum weight rating specified for the trailer hitch.
n Trailer tongue load
The trailer cargo load should be distributed so that the tongue
load is 9 to 11% of the total trailer weight, not exceeding the
maximum 500 lb. (227 kg) (Tongue load / Total trailer weight x
100 = 9 to 11%)
The total trailer weight and tongue load can be measured with
platform scales found at a highway weighing station, building
supply company, trucking company, junk yard, etc.
Total trailer weight
Tongue load