P-Metric (example 1) P185/75R14 82S

     P = Passenger Car

 185 = Section width measured in millimeters

   75 = Aspect Ratio, which means the sidewall

           height is 65 percent of the section width

    R = Radial Carcass Construction

  
   14 = Rim Diameter

   82 = Load Index

    S = Speed Rating

Speed Rating Chart:

3

6

9

12

16

19

22

25

31

37

40

43

50

56

A1

A2

A3

A4

A5

A6

A7

A8

B

C

D

E

F

G

J

K

L

M

N

P

Q

R

S

T

U

H

V

W

Y

ZR*

62

68

75

81

87

93

99

106

112

118

124

130

149

168

186

Open Ended

Aspect Ratio
height/weight

Radial
construction

Diameter
inches

Load Rating

Speed Rating

Treadwear, tractions

& temperature grades

Tire play composition

& materials used

Max. cold inflation &

load limit

U.S. DOT safety standard code