GRECH MOTORS
42
G.
H:
Indicates the tire’s speed rating. The speed
rating denotes the speed at which a tire is designed
to be driven for extended periods of time under a
standard condition of load and inflation pressure.
The tires on your vehicle may operate at different
conditions for load and inflation pressure. These
speed ratings may need to be adjusted for the
difference in conditions. The ratings range from
81 mph (130 km/h) to 186 mph (299 km/h). These
ratings are listed in the following chart.
Note:
You may not find this information on all tires
because it is not required by federal law.
Note:
For tires with a maximum speed capability over
149 mph (240 km/h), tire manufacturers sometimes
use the letters ZR. For those with a maximum speed
capability over 186 mph (299 km/h), tire
manufacturers always use the letters ZR.
H.
U.S. DOT Tire Identification Number:
This
begins with the letters DOT and indicates that the tire
meets all federal standards.
The next two numbers or letters are the plant code
designating where it was manufactured, the next
two are the tire size code and the last four numbers
represent the week and year the tire was built. For
example, the numbers 317 mean the 31st week of
1997. After 2000 the numbers go to four digits. For
example, 2501 means the 25th week of 2001. The
numbers in between are identification codes used for
traceability. This information is used to contact
customers if a tire defect requires a recall.
I.
M+S or M/S:
Mud and Snow, or
AT:
All Terrain, or
AS:
All Season.
Letter
Rating
mph (km /h)
Letter
Rating
mph (km /h)
M
81 mph (130 km/h)
U
124 mph (200 km/h)
N
87 mph (140 km/h)
H
130 mph (210 km/h)
Q
99 mph (159 km/h)
V
149 mph (240 km/h)
R
106 mph (171 km/h)
W
168 mph (270 km/h)
S
112 mph (180 km/h)
Y
186 mph (299 km/h)
T
118 mph (190 km/h)
Wheels and Tires
