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TIRE LABELING

Q.

TIRE LABELING

A.

The Sidewall of your tire is labeled with several specifications that are important for you to understand. 

Here is a brief explanation on some of the most common specifications.

A. SECTION WIDTH:

Section width is the width of an inflated tire in millimeters at its widest point.


B. ASPECT RATIO:

Section width and height are used to determine the Aspect Ratio. The lower the ratio, the shorter the sidewall.


C. RADIAL:

The "R" stands for "radial"construction.


D. RIM SIZE:

The diameter of the wheel (not the tire) in inches.


E. LOAD INDEX:

The load index number corresponds to the maximum load-carrying capacity of the tire. Refer to load index values in the chart opposite.


F. SPEED RATING

The speed rating corresponds to the tire's maximum speed capability (under optimal conditions).


Speed Rating

Speed Category:

Symbol:

MPH

km/h

M

51

130

N

87

140

P

93

150

Q

99

160

R

106

170

S

112

180

T

118

190

U

124

200

X

130

210

V

149

240

W

168

270

Y

186

300

XR

149

240

(Y)

186

300


Load IndexWt.lbs.Load IndexWt.lbs.Load IndexWt.lbs.
7585310118191273858
7688210218741283968
7790810319291294079
7893710419841304189
7996310520391314299
8099210620941324409
81101910721491334541
82104710822051344674
83107410922711354806
84110211023371364938
85113511124031375071
86116811224691385203
87120111325351395357
88123511426011405512
89127911526791415677
90132311627561425842
91135611728331436008
92138911829101446173
93143311929981456393
94147712030861466514
95152112131971476779
96156512233071486944
97160912334171497165
98165312435271507387
9917091253638151
10017641263748152

UTQG Ratings:

UTQG Ratings consist of the following 3 components: Traction, Temperature and Treadwear.

TRACTION

Traction grades range from AA, A, B and C (AA being the highest grade). These letters represent a tire's ability to stop on wet pavement as measure on a specified government test course. Any tire rated below C is considered unacceptable for road use.


TEMPERATURE

The temperature grades range from A, B and C (A being the highest and C the lowest). These letters denote a tire's ability to dissipate heat under a controlled indoor test environment. A tire rated below C is considered not approved for road use. 


TREADWEAR

This is the wear rate of the tire, comparable only to other tires within a tire manufacturer's line. 100 is the baseline. A tire with a rating of 200 will last twice as long on the government's course as compared to a tire rating 100.


Reference: http://www.gosailun.com/PLT/Labeling