UNDERSTANDING TIRE MARKINGS
5
6
Wheel diameter. This 2-digit number is the diameter of the wheel rim in inches.
Load index. This 2 or 3-digit number is the weight each tire can support. This
number is not always shown.
Federal law requires tire manufacturers to place standardized information
on the sidewall of all tires. This information identifies and describes
the fundamental characteristics of the tire and also provides the tire
identification number (TIN) for safety standard certification and in case of
a recall.
Speed rating. When stated, indicates the maximum speed at which the tire can
be used for extended periods.
Q
R
S
99
T
118
124
130
V
149
168
186
7
8
106
U
W
112
H
Y
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.
9
Maximum tire load. The maximum load which can be carried by the tire.
Maximum permissible inflation pressure. The maximum inflation pressure for
the tire. This pressure should not be used for normal driving.
10
U.S. DOT Tire Identification Number (TIN). Begins with the letters DOT and
indicates that the tire meets all federal standards. The next 2 digits/letters
represent the plant code where it was manufactured, and the last 4 digits
represent the week and year of manufacture. For example, the numbers 1712
means the 17th week of 2012. 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.
11
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. See
page 21.
12
13
14
Traction grade. Indicates a tire’s ability to stop on wet roads. A higher graded
tire should allow you to stop your vehicle in a shorter distance than a tire with
a lower grade. Traction is graded from highest to lowest as AA, A, B, and C.
See page 21.
1
2
Tire category. P indicates that the tire is for passenger vehicles
Tire width. This 3-digit number is the width (in millimeters) of the tire from
sidewall edge to sidewall edge.
Aspect ratio. This 2-digit number is 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.
Temperature grade. The tire’s resistance to heat is grade A, B, or C, with A
indicating the greatest resistance. This grading is provided for a correctly
inflated tire, which is being used within its speed and loading limits. See page
21.
3
4
Tire construction. R indicates that the tire is of Radial ply construction.
20
| Categories | Tesla, Tesla Model S |
|---|---|
| Download File |
|
| Document Type | Safety Information |
| Language | English |
| Product Brand | Tesla, Model S |
| Document File Type | |
| Copyright | Attribution Non-commercial |
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