Kia Sorento 2022 Manual page 702

Maintenance
WARNING
Tyre age
Tyres degrade over time, even when
they are not being used. Regardless
of the remaining tread, we recom-
mend that tyres be replaced after
approximately six (6) years of nor-
mal service. Heat caused by hot cli-
mates or frequent high loading
conditions can accelerate the aging
process. Failure to follow this warn-
ing can result in sudden tyre failure,
which could lead to a loss of control
and an accident involving serious
injury or death.
4. Tyre ply composition and mate
rial
The number of layers or plies of
rubber-coated fabric in the tyre.
Tyre manufacturers also must indi-
cate the materials in the tyre, which
include steel, nylon, polyester, and
others. The letter "R" means radial
ply construction; the letter "D"
means diagonal or bias ply con-
struction; and the letter "B" means
belted-bias ply construction.
5. Maximum permissible inflation
pressure
This number is the greatest amount
of air pressure that should be put in
the tyre. Do not exceed the maxi-
mum permissible inflation pressure.
8 58
Refer to "Tyre specification and
pressure label" on page 9-13.
6. Maximum load rating
This number indicates the maximum
load in kilograms and pounds that
can be carried by the tyre. When
replacing the tyres on the vehicle,
always use a tyre that has the same
load rating as the factory installed
tyre.
7. Uniform tyre quality grading
Quality grades can be found where
applicable on the tyre sidewall
between tread shoulder and maxi-
mum section width.
-
For example:
TREADWEAR 200
TRACTION AA
TEMPERATURE A
Tread wear
The tread wear grade is a compara-
tive rating based on the wear rate
of the tyre when tested under con-
trolled conditions on a specified
government test course. For exam-
ple, a tyre graded 150 would wear
one-and-a-half times (1 ) as well
on the government course as a tyre
graded 100.
The relative performance of tyres
depends upon the actual conditions
of their use, however, and may
depart significantly from the norm
Tyres and wheels