Tires and wheels
188
Operation
GTW (Gross Trailer Weight)
The GTW is the weight of the trailer plus
the weight of all cargo, equipment, lug-
gage, etc. loaded on the trailer.
GVW (Gross Vehicle Weight)
The GVW comprises the weight of the vehi-
cle including fuel, tools, spare wheel, in-
stalled accessories, passengers and cargo
and, if applicable, trailer tongue load. The
GVW must never exceed the GVWR indicat-
ed on the certification label located below
the driver's seat on the mounting pillar.
GVWR (Gross Vehicle Weight Rating)
This is the maximum permissible vehicle
weight of the fully loaded vehicle (weight of
the vehicle including all options, passen-
gers, fuel, and cargo and, if applicable,
trailer tongue load). It is indicated on the
certification label located below the driv-
er's seat on the mounting pillar.
Kilopascal (kPa)
The metric unit for air pressure. There are
6.9 kPa to 1 psi; another metric unit for air
pressure is bars. There are 100 kilopascals
(kPa) to 1 bar.
Maximum load rating
The maximum load in kg and pounds that
can be carried by the tire.
Maximum loaded vehicle weight
The sum of curb weight, accessory weight,
vehicle capacity weight and production op-
tions weight.
Maximum tire inflation pressure
This number is the highest air pressure
that should be used in the tire under nor-
mal driving conditions.
Normal occupant weight
The number of occupants the vehicle is de-
signed to seat, multiplied by 68 kg
(150 lbs).
Occupant distribution
The distribution of occupants in a vehicle
at their designated seating positions.
Production options weight
The combined weight of those installed
regular production options weighing over
5 lbs (2.3 kg) in excess of those standard
items which they replace, not previously
considered in curb weight or accessory
weight, including heavy duty brakes, ride
levelers, roof rack, heavy duty battery and
special trim.
PSI (Pounds per square inch)
A standard unit of measure for air pres-
sure. Another metric unit for air pressure is
bar or kilopascal (kPa).
Recommended tire inflation pressure
Recommended tire inflation pressure for
normal driving conditions listed on the tire
and loading information label
1
or on the
tire inflation pressure label located on the
driver's door B-pillar.
Provides best handling, tread life and ride
comfort.
Rim
A metal support for a tire or a tire and tube
assembly upon which the tire beads are
seated.
Sidewall
The portion of a tire between the tread and
the bead.
1. For vehicles with a gross weight capacity less than 10000 lbs (4536 kg) only.
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