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Weight of the Trailer Tongue
The tongue load (A) of any trailer is
an important weight to measure
because it affects the total gross
weight of the vehicle. The Gross
Vehicle Weight (GVW) includes the
curb weight of the vehicle, any
cargo carried in it, and the people
who will be riding in the vehicle.
If there are a lot of options,
equipment, passengers or cargo in
the vehicle, it will reduce the
tongue weight the vehicle can carry,
which will also reduce the trailer
weight the vehicle can tow. If towing
a trailer, the tongue load must be
added to the GVW because
the vehicle will be carrying that
weight, too. See Loading the Vehicle
on page 4-18 for more information
about the vehicle’s maximum
load capacity.
For a weight-carrying hitch, the
trailer tongue (A) should weigh
10 percent of the total loaded
trailer weight (B).
After loading the trailer, weigh the
trailer and then the tongue,
separately, to see if the weights are
proper. If they are not, adjustments
might be made by moving some
items around in the trailer.
Trailering may be limited by the
vehicle’s ability to carry tongue
weight. Tongue weight cannot
cause the vehicle to exceed the
GVWR (Gross Vehicle Weight
Rating) or the RGAWR (Rear
Gross Axle Weight Rating).
The effect of additional weight
may reduce the trailering capacity
more than the total of the additional
weight.
Consider the following example:
A vehicle model base weight
is 5,500 lbs (2 495 kg); 2,800 lbs
(1 270 kg) at the front axle and
2,700 lbs (1 225 kg) at the rear
axle. It has a GVWR of 7,200 lbs
(3 266 kg), a RGAWR of 4,000 lbs
(1 814 kg) and a GCWR (Gross
Combination Weight Rating)
of 14,000 lbs (6 350 kg). The
trailer rating should be:
Expect tongue weight to be at least
10 percent of trailer weight (850 lbs
(386 kg)) and because the weight
is applied well behind the rear axle,
the effect on the rear axle is greater
than just the weight itself, as
much as 1.5 times as much.
4-28 Driving Your Vehicle