7-38
Maintenance
Temperature - A, B & C
The temperature grades are A (the highest), B and C representing the
tire’s resistance to the generation ofheat and its ability to dissipate heatwhen tested under controlled condi-
tions on a specified indoor laboratorytest wheel.
Sustained high temperature can
cause the material of the tire to
degenerate and reduce tire life, and
excessive temperature can lead to
sudden tire failure. Grades B and A
represent higher levels of perform-
ance on the laboratory test wheel
than the minimum required by law.
Tire Terminology and Definitions
Air Pressure
The amount of air inside the tire
pressing outward on the tire. Air
pressure is expressed in kilopascal
(kPa) or pounds per square inch(psi).
Accessory Weight
This means the combined weight of
optional accessories. Some exam-
ples of optional accessories are
reduction gear, power seats, and airconditioning.
Aspect Ratio
The relationship of a tire's height toits width.
Belt
A rubber coated layer of cords that is
located between the plies and the
tread. Cords may be made from steel
or other reinforcing materials.
The temperature grade for this
tire is established for a tire that
is properly inflated and not
overloaded. Excessive speed,
under-inflation, over-inflation,
or excessive loading, either
separately or in combination,
can cause heat build-up and
possible sudden tire failure.
This may cause loss of vehicle
control resulting in an accident.
WARNING
DDIIMM EENN SSIIOO NNSS
8-2
Specifications and Reporting Safety Defects
Itemsmm (in)
Overall length4,670 (183.86)
Overall width1,860 (73.23)
Overall heightWithout roof side rails : 1,630 (64.17)
With roof side rails : 1,640 (64.57)
Front tread225/60 R171,618 (63.70)
245/45 R191,614 (63.54)
Rear tread 225/60 R171,629 (64.13)
245/45 R191,625 (63.98)
Wheelbase2,790 (109.84)
