Aston Martin DB 9 2010 Manual page 224

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[5] 15- The wheel or rim diameter in inches. If you change your
wheel size, you will have to purchase new tires to match the new
wheel diameter.
[6] 95- The tire's load index. It is an index that relates to how much
weight a tire can carry. You may find this information in your Owner's
Guide. If not, contact a local tire dealer.
You may not find this information on all tires because it is not
required by federal law.
[7] H- 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.
11.18
You may not find this information on all tires because it is not
required by federal law.
Letter Rating
Speed Rating
M
81 mph (130 km/h)
N
87 mph (140 km/h)
Q
99 mph (159 km/h)
R
106 mph (171 km/h)
S
112 mph (180 km/h)
T
118 mph (190 km/h)
U
124 mph (200 km/h)
H
130 mph (210 km/h)
V
149 mph (240 km/h)
W
168 mph (270 km/h)
Y
186 mph (299 km/h)
For tires with a maximum
3 4 5 6
2
speed capability over 149
mph (240 km/h), tire
1
manufacturers sometimes use
the letters ZR. For those with a
maximum speed capability
over 186 mph (299 km/h), tire
11
manufacturers always use the
letters ZR.
[8] TIRE IDENTIFICATION
12
NUMBER (TIN)- (Also known
11
as 'DOT Code') The Tire
Identification Number (TIN) begins with the letters 'DOT' and shows
that the tire meets all federal standards.
7
8
9
10

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