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Several markings can be found on each tire. One of the most interesting of these markings, concerns the dimensions of the tire, and has the following form:

Tire markings

Below we will analyze what each of these elements mean.

1. Width

This number is the tire width in milimeters. In this case it is a 235 mm tire.

2. Sidewall height / width relationship

This number shows the relationship between the sidewall height and the width of the tire. In this example the height of the tire is 55% of the tire's width.

3. Rim diameter

This number is the rim diameter in inches. In this example it is a 17" rim.

4. Tire load rating

This number shows the maximum load that a tire with a specific pressure can lift. Here, according to table 1, 99 means 775 kg.

5. Speed rating

It is the maximum speed for a tire. Here, according to table 2, W means 270 km/h.

Tables

1. Tire load rating

LI Kg LI Kg LI Kg LI Kg LI Kg LI Kg
0 45 10 60 20 80 30 106 40 140 50 190
1 46,5 11 61,5 21 82,5 31 109 41 145 51 195
2 47,5 12 63 22 85 32 112 42 150 52 200
3 48,7 13 65 23 87,5 33 115 43 155 53 206
4 50 14 67 24 90 34 118 44 160 54 212
5 51,5 15 69 25 92,5 35 121 45 165 55 218
6 53 16 71 26 95 36 124 46 170 56 224
7 54,5 17 73 27 97,5 37 127 47 175 57 230
8 56 18 75 28 100 38 130 48 180 58 236
9 58 19 77,5 29 103 39 133 49 185 59 243
60 250 70 335 80 450 90 600 100 800 110 1060
61 257 71 345 81 462 91 615 101 825 111 1090
62 265 72 355 82 475 92 630 102 850 112 1120
63 272 73 365 83 487 93 650 103 875 113 1150
64 280 74 375 84 500 94 670 104 900 114 1180
65 290 75 387 85 515 95 690 105 925 115 1215
66 300 76 400 86 530 96 710 106 950 116 1250
67 307 77 412 87 545 97 730 107 975 117 1285
68 315 78 425 88 560 98 750 108 1000 118 1320
69 325 79 437 89 580 99 775 109 1030 119 1360

2. Speed rating

Index Max km/h
B 50
E 70
F 80
G 90
J 100
K 110
L 120
M 130
N 140
P 150
Q 160
R 170
S 180
T 190
H 210
V 240
W 270
Y 300