Filter
Top Products
7-25
INSPECTION AND MAINTENANCE
80J23-03E
F. Load Rating
Load rating is the maximum
weight a tire is designed to sup-
port in normal service.
G. Max Inflation Pressure
Max inflation pressure is the max-
imum inflation pressure a tire is
designed for.
H. Tire Ply Material
These tire markings describe the
type of cord and number of plies
in the sidewall and under the
tread.
I. Load Index and Speed Rating
The two- or three-digit number is
the tire’s load index, the maximum
load a tire can carry at the speed
indicated by its speed symbol at
the maximum inflation pressure.
The higher the number is, the
greater the load carrying capacity.
The letter symbol denotes the
speed at which a tire is designed
to be driven for extended periods
of time. (Ratings are listed below.)
*The letters ZR may be used on tires
with a maximum speed capability over
149 mph and will always be used on
tires with a maximum speed capability
over 186 mph.
J. M+S Marking
This marking indicates the tire
has some mud and snow capabili-
ties and is designed for all-season
use.
Tire Size
The following illustration shows an
example of a typical passenger car tire
size.
67D028
A. Tire Type
This letter code indicates the pri-
mary intended use of the tire. The
letter “P” identifies a tire primarily
intended for use on a passenger
vehicle.
B. Tire Width
This three-digit number indicates
the tire section width in millime-
ters from sidewall to sidewall.
C. Aspect Ratio
This two-digit number represents
the tire section height divided by
the tire section width.
Letter Rating Speed Rating
Q99 mph
R 106 mph
S 112 mph
T 118 mph
U 124 mph
H 130 mph
V 149 mph
W 168 mph*
Y 186 mph*
A B C D E