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If the vehicle has many options and
there is a front seat passenger
and two rear seat passengers with
some luggage and gear in the
vehicle as well. 300 lbs (136 kg)
could be added to the front axle
weight and 400 lbs (181 kg) to the
rear axle weight. The vehicle
now weighs:
Weight is still below 7,200 lbs
(3 266 kg) and you might think
700 additional pounds (318 kg)
should be subtracted from the
trailering capacity to stay within
GCWR limits. The maximum trailer
would only be 7,800 lbs (3 538 kg).
You may go further and think the
tongue weight should be limited to
less than 1,000 lbs (454 kg) to avoid
exceeding GVWR. But the effect on
the rear axle must still be considered.
Because the rear axle now weighs
3,100 lbs (1 406 kg), 900 lbs
(408 kg) can be put on the rear axle
without exceeding RGAWR. The
effect of tongue weight is about
1.5 times the actual weight. Dividing
the 900 lbs (408 kg) by 1.5 leaves
only 600 lbs (272 kg) of tongue
weight that can be handled. Since
tongue weight is usually at least
10 percent of total loaded trailer
weight, expect that the largest trailer
the vehicle can properly handle is
6,000 lbs (2 721 kg).
It is important that the vehicle
does not exceed any of its
ratings — GCWR, GVWR, RGAWR,
Maximum Trailer Rating or Tongue
Weight. The only way to be sure
it is not exceeding any of these
ratings is to weigh the vehicle and
trailer.
Total Weight on the Vehicle’s
Tires
Be sure the vehicle’s tires are
inflated to the upper limit for cold
tires. These numbers can be found
on the Certification/Tire label.
See Loading the Vehicle on
page 4-18. Make sure not to go
over the GVW limit for the vehicle,
including the weight of the trailer
tongue.
Hitches
It is important to have the correct
hitch equipment. Crosswinds,
large trucks going by and rough
roads are a few reasons why
the right hitch is needed. Here are
some rules to follow:
• The rear bumper on the vehicle is
not intended for hitches. Do not
attach rental hitches or other
bumper-type hitches to it. Use
only a frame-mounted hitch that
does not attach to the bumper.
4-30 Driving Your Vehicle