User's Manual

143
TIRE INFORMATION
ASPECT RATIO
This two digit number, known as the aspect
ratio or profile, gives the sidewall height as
a percentage of the tread width. So, if the
tread width is 205 mm, and the aspect
ratio is 50, the sidewall height will be 102
mm.
TIRE CONSTRUCTION
R indicates that the tire is of Radial ply
construction.
WHEEL DIAMETER
This two digit number is the diameter of the
wheel rim in inches.
LOAD INDEX
This two or three digit number is the tire's
load index. It is a measurement of how
much weight each tire can support. This
number is not always shown.
SPEED RATING
The speed rating, when stated, denotes the
maximum speed at which the tire should be
used for extended periods. The ratings
range from 99 mph to 186 mph. These
ratings are listed in the following table.
U.S DOT TIRE IDENTIFICATION
NUMBER
This begins with the letters Department of
Transportation (DOT) and indicates that
the tire meets all federal standards. The
next two numbers or letters are the plant
code where it was manufactured, and the
last four numbers represent the week and
year the tire was built. For example, the
numbers 1716 means the 17th week of
2016. The other numbers are marketing
codes used at the manufacturer's
discretion. This information can be used to
contact consumers if a tire defect requires
a recall.
MAXIMUM PERMISSIBLE INFLATION
PRESSURE
The maximum inflation pressure for the
tire. This pressure should not be used for
normal driving.
TREADWEAR GRADE
This number indicates the tire's wear rate.
The higher the treadwear number is, the
longer it should take for the tread to wear
down. A tire rated at 400 for example, will
last twice as long as a tire rated at 200.
TRACTION GRADE
This letter indicates a tire's ability to stop
on wet pavement. A higher graded tire
should allow you to stop your Revero on
wet roads in a shorter distance than a tire
with a lower grade.
Traction is graded from highest to lowest
as AA, A, B, and C.
TEMPERATURE GRADE
Heat resistance grading. The tires
resistance to heat is grade A, B, or C, with A
indicating the greatest resistance to heat.
This grading is provided for a correctly
inflated tire, which is being used within its
speed and loading limits.
TIRE COMPOSITION AND MATERIALS
The number of plies in both the tread area,
and the sidewall area, indicates how many
layers of rubber coated material make up
the structure of the tire. Information is also
provided on the type of materials used.
Rating Speed mph (km/h)
Q 99 (160)
R106 (170)
S 112 (180)
T 118 (190)
U124 (200)
H 130 (210)
V 149 (240)
W168 (270)
Y186 (300)